rck281
Member
I don't know about the twist but there are some differences in the rifling of the 45ACP barrels and of the 14 45 Colts that were shipped around June 1959. The usual Pre-Model 25 45ACP barrel has 6 narrow grooves while the 45 Colt barrel utilizes 5 wide grooves.Jim,
Do you know what the twist is on the M25 .45 Colt?
Same as the M25 .45 ACP?