Hi guys I'm having some issues with 180 grain lead bullets. I'm using a egw u die and I'm belling the case a little more than I would with jacketed. The loading process goes ooth, but no matter what I do, add more crimp, lower Oal not 1 will pass a plunk test, and if I push them in them look at the case I can see where it is catching. It's catching about 1/8 th of an in back from the mouth of the case. The bullets are sized to .401, and there's nothing I can do to get them to plunk. Where th round catches the measurement is .422. My case mouths after crimp are .421, and after I measure my brass walls at .10 x 2 + bullet diameter of .401 I get .421 I'm starting to think out of spec chamber, it's an sti 5 inch any thoughts?