This might be controversial, but I don't mind even 17-18 thou in a 12-gauge that is otherwise in very good condition. With proper low-pressure loads I would shoot it with confidence. On sub-gauge guns I take a markedly-different tack. Sub-gauge guns (especially 20s and smaller) seem to operate at much higher pressures and I'd want a minimum of probably 25-thousands (and would prefer 30).

Last edited by Lloyd3; 02/22/18 04:21 PM.