Primer Output and Initial Projectile Motion for 5.56- and 7.62-mm Ammunition
Final rept. 1 May 2013-31 Aug 2014
ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD WEAPONS AND MATERIALS RESEARCH DIRECTORATE
Pagination or Media Count:
A novel technique for quantifying the initial motion of projectiles in unmodified small-caliber ammunition 5.56 and 7.62 mm is demonstrated. Evidence that the primer launches the bullet into the engraving process prior to propellant burning is presented. The impulse resulting from the primers Nos. 41 and 34, respectively output is measured and compared with the bullet momentum. Values for velocity and acceleration at early time are reported. Other consequences of the accurate measurements of the motion and associated pressure include comparing work done on the bullet to the kinetic energy as a function of position or time. The work presented here is a more-thorough account, along with minor corrections, of results presented at the 28th International Symposium on Ballistics.
- Ammunition and Explosives