[mustang_gt_350]

Ok, i have a simple question. When measureing the barrel to see if it is a large ring or a small ring, Should i measure the total Outside Diameter of the threads? ( caliper blades in line with the chamber as to cover a few threads when measuring?) or do you measer the valley of the threads and not the tops?
thanks:banghead:

[Jim K]

The "large ring"/"small ring" refers to the diameter of the receiver ring, not to the diameter of the barrel threads. A large ring measures 1.42", a small ring 1.35". Normally, the barrel shanks (across the top of the threads or before the threads are cut) will measure 1.10" and .980" respectively, but there are some exceptions.

Jim

[Hud]

Jim is exactly right.
He just beat me to it.

Regards, Hud