I'm having issues setting up to load 300 blackout. Using Berry 220, LC bras trying for oal of 2.15. Getting down to that oal is damaging the brass right below the neck. Leaving a bulge, using Hornady seater die and the m1 carbine powder funnel to flair mouth a little. Not sure where I'm going wrong, loaded a bunch on a single stage finally wanted to speed things up.