So i was doing a little research for my 9mm and 147 gn for major power factor (PF)
major is 165. (bullet weight(grains) x speed (fps) / 1000)
here is what i found:
powder is VV 3N38
grains / bullet / bullet weight/ primer/ case make/ OAL/ FPS/ power factor.
6.4 mg cmj 147 cci500 mix 1.125 1131 166
6.6 mg cmj 147 cci500 mix 1.13 1141 © 168
6.8 mg cmj 147 cci500 mix 1.13 1140 © 168
7 mg cmj 147 cci500 mix 1.13 1160 © primers starting to flatten 171
the (c) means compressed load
The chronograph was not reading prefectly as the sky was clear.
All were only 3 shot groups and felt nice to shoot
All were fired in a sig P320 x5 stock gun on a 35 degree day. at 45 feet above sea level.
the bullets were Montana gold CMJ
the cases were full in all but the first load. the bullet i am sure would not compress the powder any more and so the OAL grew a little without adjusting the die!
I might try a 1.140" OAL next time and Im going to load a bunch of 6.7grain and re try.
G
major is 165. (bullet weight(grains) x speed (fps) / 1000)
here is what i found:
powder is VV 3N38
grains / bullet / bullet weight/ primer/ case make/ OAL/ FPS/ power factor.
6.4 mg cmj 147 cci500 mix 1.125 1131 166
6.6 mg cmj 147 cci500 mix 1.13 1141 © 168
6.8 mg cmj 147 cci500 mix 1.13 1140 © 168
7 mg cmj 147 cci500 mix 1.13 1160 © primers starting to flatten 171
the (c) means compressed load
The chronograph was not reading prefectly as the sky was clear.
All were only 3 shot groups and felt nice to shoot
All were fired in a sig P320 x5 stock gun on a 35 degree day. at 45 feet above sea level.
the bullets were Montana gold CMJ
the cases were full in all but the first load. the bullet i am sure would not compress the powder any more and so the OAL grew a little without adjusting the die!
I might try a 1.140" OAL next time and Im going to load a bunch of 6.7grain and re try.
G