Thread: Concentricity issues after deburring

I bought a basic lyman 'ammo checker' (case gauge) which is basically a sammi cut hole to help ensure you arent about to load a deformed case). Been using it quite a lot in order to weed out any mistakes.

Had straight cases right upto the neck trimming and deburring. All cases were slippin in and out of the block before deburring. After..... bent as shit.

Thats using a typical deburr double ended tool. The bad news is, ive been ruining my concentricity for 10 years. Good news is, it hardly matters because im under 1moa almost always.

BUT. It will be interesting to see how the cases turn out when loaded. Shoving the brass into the case guage seemed to strighten it out after putting each piece in and out till it didnt grip.


But who knows if its buggered the neck tension. Guess that will become clear shortly