9mm 1911 Reloading Report

[doc540]

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

[bruceflinch]

Nice analysis. I believe your type of bullet is referred to as a "Round Shoulder", My Para 40 ate over 50,000 of those in 200 grn.

[Colt562]

right as Im looking for a 1911 in 9mm you post this..........thanks hahaha