07-27-2021, 01:33 PM
Did I miss what make of new brass your trying to downsize? I have done 75 new Starline Grendel brass down to 6ARC without any trouble whatsoever. Lee full length sizer die with shoulder set back appropriate amount, trim and shoot. Some of these brass are on their 6th firing with some pretty stout loads. In fact I'm tired of waiting on ARC brass so I will be doing another 50 cases soon. This is for an AR btw.
I with Dino in thinking that you have a sizing issue, shoulder pushed back to far?
I with Dino in thinking that you have a sizing issue, shoulder pushed back to far?