45 ACP is.452 whereas 45/70 is .458 so there's going to be very little engagement between bullet and rifling.
Standard twist on x39 is 1:8.45 or something so it's actually pretty good for subs.
Type: Posts; User: Pommy
45 ACP is.452 whereas 45/70 is .458 so there's going to be very little engagement between bullet and rifling.
Standard twist on x39 is 1:8.45 or something so it's actually pretty good for subs.