Quote:
Originally Posted by Ron Wood
...you may have to remove a tiny amount (I don’t do thousandths well  ) from the rear of the flange to get the barrel to properly index... |
1 turn is .050" (20tpi = .050" per thread), so your 180º = .025"...but you want to leave ~ 1/8 turn (~.003"); so you'd want to turn off ~.022"...and that should leave you an extractor width away when hand tight...
.022" will likely require you to ream the chamber a bit...
Caveat: Measure three times, cut once...
