06-27-2022, 07:51 AM
It does sound like your cases need bumping.
Don't put too much stock in how short your cases are relative to SAAMI specs. If your cases are sized properly you can still close the bolt on a too-long neck. The mouth of the case crumples in, and if there's a bullet there it will crimp into it.
I would screw that sizing die in a quarter of a turn at a time then test the empty case in the CZ until the bolt closes. If you've only got one Grendel sizing die then mark where the locking ring needs to go for the CZ, and another for the AR.
Don't put too much stock in how short your cases are relative to SAAMI specs. If your cases are sized properly you can still close the bolt on a too-long neck. The mouth of the case crumples in, and if there's a bullet there it will crimp into it.
I would screw that sizing die in a quarter of a turn at a time then test the empty case in the CZ until the bolt closes. If you've only got one Grendel sizing die then mark where the locking ring needs to go for the CZ, and another for the AR.