2024 Jbm ballistic

The drag function to use to calculate the ballistic coefficients. Most commercial bullets use the G1, but for some long range bullets, the G7 or G8 is typically a better choice. Some military bullets fit the G5 and G6 functions better than the G1.. Restaurants in cookeville tn open

Trajectory. Calculate a trajectory from bullet, velocity, firearm and atmospheric parameters. Explanation of terms. Library (Select bullet or enter BC and Weight below.) [?]Jbmballistics.com| Creation date: 2009-07-24T13:30:44Z. Ranking. IP: 162.241.244.88For me, the handiest aspect of JBM Ballistics is its range card calculators, which do exactly what you'd expect — outputs a handy ballistic table perfect for taking into the field. The site also offers a number of other calculators — recoil, power factor, maximum distance. It is the perfect way to lose hours online, but honestly, you'll ...The classical equation to calculate gyroscopic stability is as follows. ( Sg S g) is the gyroscopic stability factor, and must be above 1.0 if the bullet is to remain stable. Sg = 8π ρairt2d5CMα A2 B S g = 8 π ρ a i r t 2 d 5 C M α A 2 B. The variables are as follows: The gyroscopic stability factor. A bullet is stable if Sg S g is over 1.0.Ballistic's world renowned JBM ballistics engine delivers the gold standard in calculations that other applications compare themselves to. This is the STANDARD Edition.JBM Ballistics has partnered with RIANOV to provide integrated ballistics solutions, including the M06 passive ranging calculator, the SOLO calculator and the CSI. The CSI is a new digital angle indicator giving both cant and slope (or cosine of slope). RIANOV™ CSI unit mounted to Remington 700Ballistic’s world renowned JBM ballistics engine delivers the gold standard in calculations that other applications compare themselves to. The FTE version of Ballistic includes all of the great features you’ll find in the standard edition of the software, plus an advanced head-up display for mounted operation. The HUD provides real-time ...Ballistics calculations and formulas for small arms. Power Factor. The JBM Power Factor application is an simple application for calculating IDPA, SASS and USPSA power factors and divisions.All of the JBM trajectory calculators allow the user to select the drop, windage and lead (if applicable) units. Drop units are either a length such as inches or centimeters or an angle such as milliradians (mils), inches/100 yards, cm/100 meters, etc. The length is a user input value. Temperature: 0°F. Pressure: 29.92 in Hg. Relative Humidity: 30%. With the same 6.10 MOA elevation angle. The difference is that for the hunting trajectory, we are going to input this elevation angle and not have the calculation find a new elevation angle for us, so uncheck "Elevation Correction for Zero Range". It's also much more. With a vast library of nearly 5,000 projectiles and factory loads, rangefinder, range log, and head-up display, Ballistic is a complete mobile companion for hunting or at the range. Ballistic's world renowned JBM ballistics engine delivers the gold standard in calculations that other applications compare themselves to. A modified (modified by R. L. McCoy) version of M. A. Morris' RARDLIFT code with corrections for small arms bullets and medium caliber cannon projectiles. Provides interim estimates of lift, overturning moment and yaw drag coefficients. Inputs are very similar to McDrag (above) but it does require the center of gravity location. There are now hardware solutions with JBM Ballistics solutions so you can have the same accuracy in the field without having to carry a bulky computer. These units solve the equations of motion and do not use approximate methods to find the ballistics solution. For more information, or to ...Ballistics calculations and formulas for small arms. Power Factor. The JBM Power Factor application is an simple application for calculating IDPA, SASS and USPSA power factors and divisions. A modified (modified by R. L. McCoy) version of M. A. Morris' RARDLIFT code with corrections for small arms bullets and medium caliber cannon projectiles. Provides interim estimates of lift, overturning moment and yaw drag coefficients. Inputs are very similar to McDrag (above) but it does require the center of gravity location. Terminal ballistics: the study of the interaction of a projectile with its target, whether that be flesh (for a hunting bullet), steel (for an anti-tank round), or even furnace slag (for an industrial slag disruptor)." ... JBM Ballistics, Thanks to krung. Last revised by .Many modern ballistics programs, including the free online JBM Ballistics Program, are able to use BCs referenced to G7 standards. When available, these BCs are more appropriate for long range bullets, according to Bryan. [Editor's NOTE: BCs are normally reported simply as an 0.XXX number. The lb/in² tag applies to all BCs, but is commonly ...Geoballistics BallisticsARC was the most popular ballistic phone app used by this group of elite shooters, representing 33% of the shooters using phone apps. Geoballistics BallisticsARC is a free app available for iOS and Android devices, and the free version features a bullet library with 2500+ bullets, functionality for truing muzzle velocity, and support for weather hardware integration to ...Ballistics calculations and formulas for small arms. Trajectory (Simplified) Calculate a trajectory from bullet, velocity, firearm and atmospheric parameters.There is no doubt this offer will be popular, so add it to your card right away if it is available in your account before it disappears. Update: Some offers mentioned below are no ...This book, among other things, includes software and experimentally measured ballistic coefficients for 175 bullets. The bullets have been added to the JBM Bullet Library using the G7 drag function bullets measured by Bryan are denoted by " (Litz)" in the description. The G7 coefficients should give better calculations than the G1 coefficients ...JBM Ballistics has partnered with RIANOV to provide integrated ballistics solutions, including the M06 passive ranging calculator, the SOLO calculator and the CSI. The CSI is a new digital angle indicator giving both cant and slope (or cosine of slope). RIANOV™ CSI unit mounted to Remington 700 ...Trajectory Card. Calculate a trajectory card from bullet, velocity, firearm and atmospheric parameters. Density is calculated using input density altitudes. Muzzle velocity is found by using linear interpolation between two velocities measured as a fuction of temperature. Explanation of termsJBM Ballistics has partnered with RIANOV to provide integrated ballistics solutions, including the M06 passive ranging calculator, the SOLO calculator and the CSI. The CSI is a new digital angle indicator giving both cant and slope (or cosine of slope). RIANOV™ CSI unit mounted to Remington 700 ...Ballistic's world renowned JBM ballistics engine delivers the gold standard in calculations that other applications compare themselves to. This is the STANDARD Edition. The ADVANCED Edition also includes: - iPhone internal barometer supported. - An advanced head-up display for mounted operation. - Advanced wind kit configurable for up to 8 wind ...Ballistic Coefficient (Time) Calculate a ballistic coefficient from initial velocity, time of flight and distance. Calculuated ballistic coefficient is displayed for selected drag function. Explanation of terms Descriptions % Percentage 1 ELD M (Extremely Low Drag Match) 8.5 2 ELD-X (Extremely Low Drag - eXpanding) 8.1 3 HPBT MatchKing™ 5.0 4 SST® 3.6 Ballistic Coefficient (Time) Calculate a ballistic coefficient from initial velocity, time of flight and distance. Calculuated ballistic coefficient is displayed for selected drag function. Explanation of terms. Near Velocity (500.0 to 4800.0 ft/s) [3000.0] [?]The ballistic coefficient is represents the ratio of the drag of the standard (e.g. G1 standard bullet) bullet to that of the bullet you are shooting. A ballistic coefficient of 0.100 means that your bullet has 10 times the drag of the standard bullet. Barrel Twist The twist length of the barrel. Twist DirectionThe JBM Ballistic Calculator takes into account several critical variables to ensure the highest degree of precision. These variables include bullet shape, bullet weight, velocity, wind speed, and atmospheric conditions. Armed with these calculations, a shooter can confidently make the shot and predict where it will hit, within a "margin of ...Ballistic based their app on the JBM calculator, which is the recognized highest standard among ballistics computers, but Ballistic itself is a company entirely independent of JBM Ballistics. Competitors can input projectile characteristics from that large Ballistic library, and create custom data from their own handloads. ...The ballistic coefficient is represents the ratio of the drag of the standard (e.g. G1 standard bullet) bullet to that of the bullet you are shooting. A ballistic coefficient of 0.100 means that your bullet has 10 times the drag of the standard bullet. Bullet Length The length of the bullet.JBM Ballistics has partnered with RIANOV to provide integrated ballistics solutions, including the M06 passive ranging calculator, the SOLO calculator and the CSI. The CSI is a new digital angle indicator giving both cant and slope (or cosine of slope). RIANOV™ CSI unit mounted to Remington 700 ...Since w x is constant, one can readily perform the integrals (assuming constant k) . u x = w x [ 1 - u y /u x0] . Integrate one more time with respect to t on the interval [0,t] x = ∫ u x dt [0,t] = w x [ t - R/u x0] . where R = ∫ u y dt [0,t] . and x is the deflection, u x0 is the muzzle velocity (initial velocity in the y direction), R is the range, t is the time of flight to that range ...The ballistic coefficient is represents the ratio of the drag of the standard (e.g. G1 standard bullet) bullet to that of the bullet you are shooting. A ballistic coefficient of 0.100 means that your bullet has 10 times the drag of the standard bullet. Bullet Length The length of the bullet.In spirit of giving gifts :) Top row is the wind direction with 90deg being a full value wind Left column is wind speed in mph. sight corrections are to the nearest 1/4 moa. Wind drift based on JBM Ballistics software.Define a coordinate system where y is the range variable, x and z are perpendicular to the trajectory where x is to the shooters right and z is up. Then rewrite the derivative d u / dt a = d u / dt = (d u / dy) (dy/dt) = - k (u - w)+ g. But dy/dt is just the velocity in the y direction (down range) written u y, thenWith a vast library of nearly 5,000 projectiles and factory loads, rangefinder, range log, and head-up display, Ballistic is a complete mobile companion for hunting or at the range. Ballistic's world renowned JBM ballistics engine delivers the gold standard in calculations that other applications compare themselves to. iPad-Specific Features:The distance from the point of the first velocity measurement to the point of the second measurement. This is the distance between the two chronographs. Drag function. A drag function (or G function) provides the forces on a standard bullet for which the drag function was derived. A bullet's ballistic coefficient then relates the drag on any ...The Leatherwood ART Scope Trajectory Cam needs to be set to the correct cam setting for your caliber and rifle. This video goes over how to use JBM Ballistic...Plastic Tip Length. Length of the plastic "ballistic tip" if it exists. Otherwise zero. Caliber. Diameter of the bullet. Muzzle Velocity. The velocity of the bullet as either (1) measured at some distance from the muzzle or (2) as estimated from reloading data. The on-line ballistics page can correct for the distance to chronograph.JBM ballistics drop table ??? Thread starter Straight Shooter; Start date Jul 9, 2020; Help Support Long Range Hunting Forum Become a supporting member. Prev. 1; 2; 3; First Prev 3 of 3 Go to page. Go. S. Straight Shooter Well-Known Member. Joined Feb 19, 2012 Messages 609 Location Bluffdale, UT. Jul 10, 2020It's also much more. With a vast library of nearly 5,000 projectiles and factory loads, rangefinder, range log, and head-up display, Ballistic is a complete mobile companion for hunting or at the range. Ballistic's world renowned JBM ballistics engine delivers the gold standard in calculations that other applications compare themselves to.Stability. Calculate a stability factor for a bullet using the Miller stability formula. Output is red for unstable, yellow for marginal stability and green for stable. Explanation of terms. …The G7 Ballistic coefficient does a better job of predicting the trajectory of modern long ogive, boat tail bullets to longer ranges than the G1 standard, however, it is still not modeling the exact Cd value or shape and will result in errors. Utilizing the popular and well-designed JBM ballistics code, Error! Reference source not found.. shows ...Ballistics calculations and formulas for small arms. Drag Function Array Conversion. Convert multiple ballistic coefficients and find the best new drag function.A modified (modified by R. L. McCoy) version of M. A. Morris' RARDLIFT code with corrections for small arms bullets and medium caliber cannon projectiles. Provides interim estimates of lift, overturning moment and yaw drag coefficients. Inputs are very similar to McDrag (above) but it does require the center of gravity location.It's also much more. With a vast library of nearly 5,000 projectiles and factory loads, rangefinder, range log, and head-up display, Ballistic is a complete mobile companion for hunting or at the range. Ballistic's world renowned JBM ballistics engine delivers the gold standard in calculations that other applications compare themselves to.The world-renowned JBM Ballistics engine powers all Ballistic computations. Ballistic is used by competition shooters, long-range hunters, and the military to deliver the most precise calculations ...The ballistic coefficient is represents the ratio of the drag of the standard (e.g. G1 standard bullet) bullet to that of the bullet you are shooting. A ballistic coefficient of 0.100 means …About. JBM has been providing free online ballistics calculators and info for approximately fifteen years. During that time JBM has written custom ballistics software for a number …Ballistics calculations and formulas for small arms. Drag Function Array Conversion. Convert multiple ballistic coefficients and find the best new drag function.Taking a truly long shot requires more than just steady aim. Long-distance shooting requires understanding of ballistics, wind, bullet drop, velocityThe Berger twist calculator works fine, but it does not include a variable for polymer tipped bullets (Berger doesn't sell any). The polymer tip affects the calculation. Generally the Berger calculator will overestimate the twist necessary to stabilize bullets with polymer tips. For Hornady ELD-X bullets (polymer tip), use the JBM calculator.Calculates the power factor and checks divisions for IDPA, IPSC, TSA, USPSA and SASS. Output shows whether or not the division is made (green/red) and by how much in percent. Calculates the free recoil energy and velocity using firearm weight, charge weight, bullet weight and firearm velocity.The ballistic coefficient is represents the ratio of the drag of the standard (e.g. G1 standard bullet) bullet to that of the bullet you are shooting. A ballistic coefficient of 0.100 means that your bullet has 10 times the drag of the standard bullet. Barrel Twist The twist length of the barrel. Twist DirectionJochem Peelen, Books on Demand, GmbH, 22848 Norderstedt, Germany, 2006. ISBN10 3-8334-6697-9, ISBN13 978-3-8334-6697-7. A very nice book on common and uncommon drag functions. Book includes printout of computer code to model drag functions and choose drag function for a bullet. A must have for anybody interested in exterior ballistics.Jun 23, 2022 · To make one, first generate a come-up table, using one of the free online ballistics programs such as JBM Ballistics. You can also put the info in an Excel spreadsheet or MS Word table and print it out. Above is a sample of a data card. For each distance, the card includes drop in inches, drop in MOA, drop in Mils. I noted in my web page on making Density Altitude ballistic cards that JBM Ballistics would not accept a DA input below -1000 feet. Making Ballistic Cards Using Density Altitude I dropped the author of that program a note this morning, requesting that he consider reducing that minimum DA, as...PSECU is a credit union in Pennsylvania that was founded in 1934 by 22 state employees. Now, it has nearly half a million members and will give you $250 for opening a new account a...This book, among other things, includes software and experimentally measured ballistic coefficients for 175 bullets. The bullets have been added to the JBM Bullet Library using the G7 drag function bullets measured by Bryan are denoted by " (Litz)" in the description. The G7 coefficients should give better calculations than the G1 coefficients ...The ballistic coefficient is represents the ratio of the drag of the standard (e.g. G1 standard bullet) bullet to that of the bullet you are shooting. A ballistic coefficient of 0.100 means that your bullet has 10 times the drag of the standard bullet. Bullet Length The length of the bullet.JBM Ballistic: Standard Edition. Filed in iPhone Apps. Ballistic is the definitive ballistics trajectory calculator for the iPhone. Ballistic calculates trajectory, windage, velocity, energy, and bullet flight time for any valid range, and can compensate for atmospheric conditions such as temperature, barometric pressure, humidity, and altitude ...A modified (modified by R. L. McCoy) version of M. A. Morris' RARDLIFT code with corrections for small arms bullets and medium caliber cannon projectiles. Provides interim estimates of lift, overturning moment and yaw drag coefficients. Inputs are very similar to McDrag (above) but it does require the center of gravity location.A modified (modified by R. L. McCoy) version of M. A. Morris' RARDLIFT code with corrections for small arms bullets and medium caliber cannon projectiles. Provides interim estimates of lift, overturning moment and yaw drag coefficients. Inputs are very similar to McDrag (above) but it does require the center of gravity location.The Ballistic: Advanced Edition software is easy to use, with nice controls. Underneath it all is the proven JBM Ballistics calculator. And here’s the kicker — this excellent mobile App software is now FREE to download and install on iPhones and iPads! This Video Explains How to Set Up and Use Ballistic: Advanced EditionBallistics calculations and formulas for small arms. Drag Function Array Conversion. Convert multiple ballistic coefficients and find the best new drag function.The ballistic coefficient is represents the ratio of the drag of the standard (e.g. G1 standard bullet) bullet to that of the bullet you are shooting. A ballistic coefficient of 0.100 means that your bullet has 10 times the drag of the standard bullet. Bullet Length The length of the bullet.The world-renowned JBM Ballistics engine powers all Ballistic computations. Ballistic is used by competition shooters, long-range hunters, and the military to deliver the most precise calculations possible. With Ballistic, you'll be able to make the most accurate calculations for every shot, everywhere, even in areas with no cellular coverage.Ballistics calculations and formulas for small arms. Trajectory. Calculate a trajectory from bullet, velocity, firearm and atmospheric parameters.Trajectory μCard. Calculate a trajectory card from bullet, velocity, firearm and atmospheric parameters. Density is calculated using input density altitudes. Muzzle velocity is found by using linear interpolation between two velocities measured as a fuction of temperature. Explanation of termsI have a question concerning data input on the JBM site. In their section for trajectory cards they ask to input the altitude. I'm assuming they are asking for the density altitude, but they don't really say. Anyone know for sure? Are they asking for the density altitude or just regular...Integrating this equation is much easier when trajectory parameters are required as a function of range. [This vector equation for velocity is derived in the discussion of CD and KD] But, it does introduce another differential equation for time. Simultaneous Equations of First OrderThis is done by measuring the drag of the standard bullet. This standard bullet has a ballistic coefficient (BC) of 1.0. Other bullets of the same shape but different size have different ballistic coefficients. The drag function and BC are then used to calculate the drag coefficient and therefore the drag on a bullet of similar shape to the ...Ballistic coefficient facts. In ballistics, the ballistic coefficient (BC) of a bullet is a measure of its ability to overcome air resistance in flight. A high BC means the object will slow down less. It will have more of its speed left when it reaches the target. BC depends on mass, diameter, and drag coefficient. Ballistic coefficient has units of lb/in² or kg/m².The ballistic coefficient is represents the ratio of the drag of the standard (e.g. G1 standard bullet) bullet to that of the bullet you are shooting. A ballistic coefficient of 0.100 means that your bullet has 10 times the drag of the standard bullet. Bullet Length The length of the bullet.My understanding is that the JBM range card function uses density altitude. My understanding is also that the temperature inputs are for transonic calculations. Density altitude is pressure altitude corrected for temperature, and, to a minute extent, humidity. It is a measure of air density. 4000 DA is 4000 DA whether the temperature is 0F or 120F. The velocity of the bullet as either (1) measured at some distance from the muzzle or (2) as estimated from reloading data. The on-line ballistics page can correct for the distance to chronograph. (The velocity lost traveling to the chronograph.) Nose Length. Tabulated values of the G1, G5, G6, and GL drag (G) functions, taken from Exterior Ballistics of Small Arms Projectiles , E. D. Lowry, Research Dept., Winchester-Western Division, Olin Mathieson Chemical Corporation, May 4, 1965. More Drag Functions With that said, the JBM ballistics engine is far superior to its competitors in that, in addition to basic 3-DOF calculations, JBM’s sophisticated engine is capable of accounting for advanced calculations including linear wind calculations (and calculations from more than one wind zone), better atmospheric density equations, and incorporates ... Ballistics calculations and formulas for small arms. Recoil. Calculate recoil from muzzle velocity and bullet, powder and rifle weight.The ballistic coefficient is represents the ratio of the drag of the standard (e.g. G1 standard bullet) bullet to that of the bullet you are shooting. A ballistic coefficient of 0.100 means that your bullet has 10 times the drag of the standard bullet. Bullet Length The length of the bullet.Ballistic's world renowned JBM ballistics engine delivers the gold standard in calculations that other applications compare themselves to. Advanced Edition Features: - iPhone internal barometer supported. - …Bullets % Percentage 1 Hornady, ELD-X (Extremely Low Drag - eXpanding), 0.264 cal, 143.0 gn 2.0 2 Sierra, HPBT MatchKing™, 0.308 cal, 175.0 gnCalculates the power factor and checks divisions for IDPA, IPSC, TSA, USPSA and SASS. Output shows whether or not the division is made (green/red) and by how much in percent. Calculates the free recoil energy and velocity using firearm weight, charge weight, bullet weight and firearm velocity. Ballistic is a fast, highly-accurate ballistic trajectory calculator and range companion for the iPhone. Currently $3.99 US. Ballistic_XLR A modified Pejsa model implemented in a spreadsheet. Free. Ballistic Explorer by Oehler Research External ballistics programs for DOS and Windows with demo. $60-$70. Ballistik Pro 1.1 Applied Ballistics, Gun-werks and JBM Ballistics all offer advanced ballistic coefficient (BC)-based solvers. Hornady took it a step further with its Four Degrees of Freedom (4DOF), which is a drag-coefficient, projectile-dynamics-based program that previously was only available to defense contractors and the government.JBM Ballistics has partnered with RIANOV to provide integrated ballistics solutions, including the M06 passive ranging calculator, the SOLO calculator and the CSI. The CSI is a new digital angle indicator giving both cant and slope (or cosine of slope). RIANOV™ CSI unit mounted to Remington 700 ...World renowned JBM ballistics engine for the most precise, accurate calculations in the industry. Load Library: Nearly 5,000 commercial and military projectiles and factory loads from leading manufacturers or specify your own projectile properties. Includes latest commercial data and military coefficients established at Aberdeen Proving Grounds.The ballistic coefficient is represents the ratio of the drag of the standard (e.g. G1 standard bullet) bullet to that of the bullet you are shooting. A ballistic coefficient of 0.100 means that your bullet has 10 times the drag of the standard bullet. Barrel Twist The twist length of the barrel. Twist DirectionThe world renowned JBM Ballistics computer is powering all of Ballistic's computations. JBM is used by world-class shooters everywhere to deliver some of the most precise calculations. You'll even be able to take JBM's extremely accurate calculations with you, even into areas with no cellular coverage.

Shareware exterior ballistics software, $10 Registration Fee. There is also a group size calculator, also $10. Web Based; BBT P-Max Inernal Ballistics Simulator This is a free, online, internal ballistics simulation program. Handloads.com An online trajectory calculator. They also have a recoil and energy calculator. JBM Small Arms Ballistics. Evo dripping springs tx

Maybe 1 in 250,000 shooters have actually tested, created, and built special software to use a custom drag curve. OP, have you accounted for higher temperatures than the bullet's BC is based on. Most bullet BCs are based on an atmospheric standard like ICAO, Std Metro, or Std. Army. All three at 59degF.The JBM Ballistics online calculator is well-trusted and sophisticated ballistic calculator. The Hornady 4DOF ballistic calculator; The Applied Ballistics (AB), JBM, and Hornady 4DOF ballistic solvers can be found in both phone app ballistic calculators (see next section) and embedded in device-based ballistic calculators (e.g., laser ...JBM Ballistics has partnered with RIANOV to provide integrated ballistics solutions, including the M06 passive ranging calculator, the SOLO calculator and the CSI. The CSI is a new digital angle indicator giving both cant and slope (or cosine of slope). RIANOV™ CSI unit mounted to Remington 700 ...The ballistic coefficient is represents the ratio of the drag of the standard (e.g. G1 standard bullet) bullet to that of the bullet you are shooting. A ballistic coefficient of 0.100 means that your bullet has 10 times the drag of the standard bullet. Bullet Length The length of the bullet.Applied Ballistics' mission is to be a complete and unbiased source of external ballistics information for long range shooters. We're highly active in R&D, constantly testing new claims, products and ideas for potential merit and dispensing with the marketing hype which can make it so difficult for shooters to master the challenging discipline of long range shooting.Ballistics calculations and formulas for small arms. Trajectory. Calculate a trajectory from bullet, velocity, firearm and atmospheric parameters.Drag Function. The drag function for the enter ballistic coefficient. New Drag Function. The drag function to convert the above ballistic coefficient to. Velocity. The velocity at which the ballistic coefficient entered above is defined. If you only have one BC and no velocity information, use the average of the muzzle velocity and terminal ...Ballistics calculations and formulas for small arms. Drag Function Conversion. Convert a ballistic coefficient from one drag function to another.External ballistics or exterior ballistics is the part of ballistics that deals with the behavior of a projectile in flight. The projectile may be powered or un-powered, guided or unguided, spin or fin stabilized, flying through an atmosphere or in the vacuum of space, but most certainly flying under the influence of a gravitational field ...Ballistics calculations and formulas for small arms. Energy Questions about energy come up on USENET (specifically rec.guns) often enough that I thought it might be worth putting a page here in an attempt to explain how the energy is calculated used.JBM Web-based ballistic computer. Plus a lot of related material: formulas, drag tables etc. Check it out. JBM – an “improved” versionThis version lets you put in BC/velocity breakpoints and the program figures out what BC to use based on the velocity for the point being calculated. It may be more accurate than JBM’s original, if you ...Trajectory (Drift) Calculate a trajectory from bullet, velocity, firearm and atmospheric parameters. Explanation of terms. Library (Select bullet or enter BC and Weight below.) [?]With that said, the JBM ballistics engine is far superior to its competitors in that, in addition to basic 3-DOF calculations, JBM's sophisticated engine is capable of accounting for advanced calculations including linear wind calculations (and calculations from more than one wind zone), better atmospheric density equations, and incorporates ...Just a quick review. Recently used it to create some data cards. Excellent tool, very user friendly. Selected the off-the-shelf Sierra data for the 30 cal. 175 MatchKing 300 yard zero with 2750 ft/s MV. Calculator stated 15.9 MOA drop to 750 yards and 23.3 MOA drop to 900 yards. Set up LV....

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