They were proofed the same at 12,500psi with bulk smokeless, even higher if it is a late gun. As Harry said, the issue is how hard you want to whack your shoulder. Going grouse hunting where you might shoot 4-5 times a day may be fine as compared to a round of 100 at sporting clays. Then of course not all 1 frame 12's are light guns and not all 2 frame 12's are heavy.
TPS shows recommended normal and max pressure tables.
Last edited by Bruce Day; 09-30-2009 at 08:39 AM..
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