first 9mm reloads on the Rock Chucker
1978 Colt Combat Commander in 9mm
4.25"
Bar-Sto match barrel
25yds
Semi-rested
Control rounds:
Federal 115gr FMJ - Avg 1081fps
DC Ammo Match 147gr FMJ 1.125OAL Fed primers - Avg 945fps
Reloaded rounds:
RMR Bullets - 124gr plated round nose (semi-flat)
Misc tumbled brass
Powder: Win231
Test loads: 4.1/4.4/4.7 Win231
OAL 1.10
4.1 = avg 992fps
4.4 = avg 1026fps
4.7 = avg 1066fps (most consistent)
Control target:
Best accuracy:
124gr (125 is incorrect on the pic) - 4.7gr Win231
Next best accurate:
4.1gr Win231
Conclusion: this 9mm Combat Commander likes 124gr Copper Round Nose over 4.7 Win231
YMMV
1978 Colt Combat Commander in 9mm
4.25"
Bar-Sto match barrel
25yds
Semi-rested
Control rounds:
Federal 115gr FMJ - Avg 1081fps
DC Ammo Match 147gr FMJ 1.125OAL Fed primers - Avg 945fps
Reloaded rounds:
RMR Bullets - 124gr plated round nose (semi-flat)
Misc tumbled brass
Powder: Win231
Test loads: 4.1/4.4/4.7 Win231
OAL 1.10
4.1 = avg 992fps
4.4 = avg 1026fps
4.7 = avg 1066fps (most consistent)
Control target:
Best accuracy:
124gr (125 is incorrect on the pic) - 4.7gr Win231
Next best accurate:
4.1gr Win231
Conclusion: this 9mm Combat Commander likes 124gr Copper Round Nose over 4.7 Win231
YMMV
