Bullet Ballistics 101 Pressure, Velocity & Distance
Sep 14, 2012·Bullet Ballistics Velocity. Measuring gas pressure proved as difficult at first as measuring bullet velocity. Then, in the mid 1800s, Alfred Nobel and an American named Rodman came up with solutions to that problem at the same time. Rodmans, the crusher system, is still in use. Cases of rimfire ammunition are thin, limiting pressures.