Sir Ron, Every chamber an individual indeed. I find my 458WM chamber to accept 2.515 brass just fine. So I have not trimmed in a while, as in did it once and quit... I also try pretty hard to not size any further down than it takes to hold a bullet, again trying not to move brass around too much. Sure wish Lee would make a collet "neck" size die for it. I guess they don't think enough of those would sell. I was thinking just yesterday about that belt to bolt face measurement dilemma in our 458's and stretching. I have never lost a case but probably have only 4 maybe five reloads on the older ones. Let's hope this is a problem of the "maybe" only and the magnificent 458WM is just as terrific to the brass as it is to the launched bullets yes? Best regards, F01
