I once had a similar problem, no matter how hard I cranked that die down it wouldn't chamber nicely. One issue was I was using a Hornady shell holder with RCBS dies or maybe and RCBS shell holder with Hornady dies. Its a long way to gun shop for me, and it was a weekend. So I fitted the shell holder to the drill press, turned it on and lowered it on to an oilstone and removed a few thou, the only way I knew how with limited facilities. It worked.
So maybe your shell holder is not the correct one for your case, or its not the same manufacturer as your dies, or maybe its just a bit too high for your chamber. If you can find another shell holder that would be the first place Id start looking.
And dont incrementally screw it down, screw it down to the max right at the start until your reloading handle is "camming over" when you bring the ram up to the die. Then once you have it doing that, check your cases for chambering. After that and you have made some reloads, then start to play with not sizing it as much.
Bookmarks