Ballistic formulas for bullets
How do you calculate ballistic coefficient?
The ballistic coefficient can then be remembered as sectional density divided by form factor. Since the ballistic coefficient is the inverse of the drag scale factor, at any bullet velocity number, the standard drag deceleration of the standard bullet is divided by the ballistic coefficient to obtain the actual drag deceleration of the real bullet.
Does a larger ballistic coefficient affect the performance of a bullet?
When comparing two bullets, the one with the larger drag scale factor has a larger drag, while the one with the larger ballistic coefficient has smaller drag. It just feels better that as ballistic coefficient grows larger, ballistic performance of a bullet gets better.
How do you calculate the mass of a bullet?
Since the mass of a bullet is easy to know, it all comes down to the force that’s applied; the aerodynamic drag force. In words, the aerodynamic drag force is equal to the dynamic pressure, times the bullets frontal area, times its drag coefficient. These 3 terms bear some discussion.
What is external ballistics based on?
All of external ballistics is based on how much velocity the bullet loses as it flies thru the air. The amount of: drop, wind drift, time of flight, and every other aspect of a bullets trajectory are all determined by the bullets velocity, and the rate it’s slowing down.
[PDF File]Comparing Advertised Ballistic Coefficients with Independent ...
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Ballistic coefficients of bullets are important because under or over estimates of ballistic coefficients can dramatically impact predictions of long range trajectory, wind drift, and impact energy. This project compares ballistic coefficients advertised by four well-known bullet companies (Hornady, Nosler, Sierra,
[PDF File]Aerodynamic Drag Modeling for Ballistics
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All of external ballistics is based on how much velocity the bullet loses as it flies thru the air. The amount of: drop, wind drift, time of flight, and every other aspect of a bullets trajectory are all determined by the bullets velocity, and the rate it’s slowing down.
[PDF File]THE BALLISTIC COEFFICIENT - Sierra Bullets
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THE BALLISTIC COEFFICIENT William T. McDonald Ted C. Almgren December, 2008 The term “ballistic coefficient” is familiar to most shooters today. They know that the ballistic coefficient of a bullet is a measure of how well it retains velocity as it travels downrange and how well it “bucks” the wind.
[PDF File]Practical Ballistics
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Form factor is simply a comparison of a particular bullets drag to the drag of a standard projectile. There are many standard projectiles; G1 and G7 are the ones in most common use. Suppose you compared the drag of a bullet to the G1 standard and found your bullet had 55.6% the drag of that standard projectile.
[PDF File]ABDOC2.2 - A Better Ballistic Coefficient - Applied Ballistics
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For the short, flat based, blunt nosed bullets, the G1 standard is actually more representative. For that reason, BCs for flat based bullets should continue to be referenced to the G1 standard. In other words, the G7 BC is better for boat tailed bullets, while G1 BCs are better for flat based bullets.
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