Absolutely invaluable info. Thanks all!

One quick question - I understand if a barrel were un-torqued and then re-torqued, it will tighten a bit further. Anyone know approximately how many degrees further?

I have a new acquisition that had a not-so-professional barrel replacement somewhere along the line and the barrel is about 4-5 degrees before top dead center/12:00. Shot groups are tight but off to the left, as you would imagine. I'm thinking that maybe a local gunsmith could just back it off and re-torque it to 12:00 without any shoulder cutting or other adjustments. (B/C gap is .004)

I would like to fix it, but I'm wondering if it would be worth the expense/effort for an old non-collectable commonwealth Victory. There's always the bench-vise and pipe wrench technique... ;-)

Thanks!