Having troubles with a very picky 30-30 levergun (10-15 % reloaded cartriges reiected) I come to conclusione that one of the factor coming in play is the shoulder of repetively shooted cases. So I found a bushing that flush pass the collett and seat at the firts third of 30-30 case's shoulder. Then I measured some new factory loads, some ONLY once reloaded and shooted loads (this should be carbon copy of my rifle chamber) and some pluri-fired cases. Only this one differ as much as half a millimetr or more while the other's two had way similar dimensions. Assuming that shoulder of the "difform" cases had "walked-on" by being repeating fired (I full size once a time after three neck sizing) I FSized them and.......you can see a huge diff in thee pics First and after FL. Interesting note: the cheaper LEE RGB FL seems resinzing way more deeper than the RCBS FL die I have. What You all think aboout? Please correct me where I am wrong.