Agree with all...
Gents, thank you. Yes I agree with all. 2.5 doesn't mean low pressure. And yes, no one can assuage my fears with advice or opinions. I've measured the 20 ga. using Researcher's advice the other day. I'm pretty sure it was originally built to carry 2.75s. I'm waiting on the 12 ga. Damascus and will, now with the insight provided here, have a qualified gunsmith do all the measurements and assessments, as well as confirm whether the chambers were modified. It seems that the 12 ga. has some records on file that I will order. Perhaps the original chamber details are published there. In any event, I want to shoot these and think that 2.5 inch low pressure might be a good way to treat them. Whether at the range or chasing upland birds.
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