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2. Transitional ballistics - Wikipedia

   en.wikipedia.org/wiki/Transitional_ballistics

   Transitional ballistics is a complex field that involves a number of variables that are not fully understood; therefore, it is not an exact science. [6] When the bullet reaches the muzzle of the barrel, the escaping gases are still, in many cases, at hundreds of atmospheres of pressure. [3] Once the bullet exits the barrel, breaking the seal ...

3. External ballistics - Wikipedia

   en.wikipedia.org/wiki/External_ballistics

   External ballistics. This schlieren image of a bullet travelling in free-flight demonstrates the air-pressure dynamics surrounding the bullet. 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 ...

4. Ballistics - Wikipedia

   en.wikipedia.org/wiki/Ballistics

   The blue object experiences Stokes' drag, and the green object Newtonian drag. Ballistics is the field of mechanics concerned with the launching, flight behaviour and impact effects of projectiles, especially ranged weapon munitions such as bullets, unguided bombs, rockets or the like; the science or art of designing and accelerating ...

5. Sectional density - Wikipedia

   en.wikipedia.org/wiki/Sectional_density

   Sectional density (often abbreviated SD) is the ratio of an object's mass to its cross sectional area with respect to a given axis. It conveys how well an object's mass is distributed (by its shape) to overcome resistance along that axis. Sectional density is used in gun ballistics. In this context, it is the ratio of a projectile 's weight ...

6. Ballistic coefficient - Wikipedia

   en.wikipedia.org/wiki/Ballistic_coefficient

   The 6 mm and 6.5 mm cartridges are probably the most well known for having high BCs and are often used in long range target matches of 300 m (328 yd) – 1,000 m (1,094 yd). The 6 and 6.5 have relatively light recoil compared to high BC bullets of greater caliber and tend to be shot by the winner in matches where accuracy is key.

7. Terminal ballistics - Wikipedia

   en.wikipedia.org/wiki/Terminal_ballistics

   Terminal ballistics. Bullet parts: 1 metal jacket, 2 lead core, 3 steel penetrator. Terminal ballistics is a sub-field of ballistics concerned with the behavior and effects of a projectile when it hits and transfers its energy to a target. Bullet design (as well as the velocity of impact) largely determines the effectiveness of penetration.

8. Power factor (shooting sports) - Wikipedia

   en.wikipedia.org/wiki/Power_factor_(shooting_sports)

   Power factor (shooting sports) A high-speed photograph of a .38 Special bullet fired out of a Smith & Wesson Model 686 revolver. Power factor (PF) in practical shooting competitions refers to a ranking system used to reward cartridges with more recoil. Power factor is a measure of the momentum of the bullet (scaled product of the bullet's mass ...

9. Gauge (firearms) - Wikipedia

   en.wikipedia.org/wiki/Gauge_(firearms)

   (Round balls lose velocity faster than conical bullets and have much steeper ballistic trajectories beyond about 75 yards or 69 metres) In contrast, a 4-bore express rifle often used a 1,500-grain (3.43 oz; 97.20 g) bullet wrapped in paper to keep lead buildup to a minimum in the barrel. In either case, assuming a 4-ounce (110 g) mass for a 4 ...