This mourning is my first time using a Lyman M die on some new 444 brass. They look really weird coming out of that die really bulged out but .432 dia. bullets seem to fit into case pretty good. Just putting them in with fingers. With oversize bullets are they just going to look that way. I would hate to screw up some 444 brass as its now made of unobtainium. This question may sound dumb but the only dumb question is the one you don't ask. I have only loaded jacketed bullets before and didn't use M die. And I have several M dies now 30-30 .32 .35 .444.