I have found that a lot of Parker hammer guns have really thick barrels. Of course, you should always measure to make sure, but that has been my experience

This one has a fair amount of pitting but given the barrel thickness and the loads I am shooting I was not worried. After I get to know a bit more, I will have the barrels honed and refinished. This is my only 3-frame 12 gauge gun and it is heaver than all but 1 of my other 10 gauges(and that one is only 2 ounces heavier).

I do have one early lifter where the barrels are relatively thin. It is a 1874 lifter I got last year. I had not every seen barrels that thin at the chambers, but this one quickly turned into one of my favorite guns. I take it easy on it with 3/4 oz loads...

I would be careful with honing. I have seen guns ruined by honing.