Save yourself a lot of grief and grab a neck expander/mouth flaring die too, sized to fit the bullet you use (ie: .309 for .310 diameter bullets, .310 for .311's, etc.) Lyman and RCBS make good ones, as do others I'm sure. I'm partial to the RCBS, but that's personal preference.
Squeezing a typically oversized .30 lead bullet (sized to fit your throat) into a case prepped for .308 jacketed bullets does two things: it'll like as not further reduce the diameter of the bullet (brass is harder than lead), and will likely shave lead off the bullet too (hence the mouth flaring aspect of the above mentioned dies).
Last edited by gnoahhh; 05/06/20.
