6.5 Creedmoor Tight Round Chambering

[H4350]

are you using new unfired brass for your dummy rounds or brass thats been fired in another riffle?

Thats exactly what it was, I bought once fired brass of a guy. I full length resized it but I guess I didn't bump the shoulders far back enough.

I screwed the die down another full turn, sized the brass, then tried another dummy round. It chambered just fine.

[DocDoc]

Thats exactly what it was, I bought once fired brass of a guy. I full length resized it but I guess I didn't bump the shoulders far back enough.

I screwed the die down another full turn, sized the brass, then tried another dummy round. It chambered just fine.

That is quite a bit to change at one time. You want to be careful you do not bump the shoulder back so far that you end up with excess headspace, that can lead to case separation at the head.