Brass prep and sizing for the auto loader.

[JohnMOhio]

The idea of sizing a case is to make it acceptable to the particular rifle chamber. On bolt guns, sizing the shoulder back .002 is sufficient. For a semi-auto, it is recommended the shoulder set back be .004. You need the correct tooling to take those measurements and set your die to give you the proper results. If your not knowledgeable in how to do it, I suggest you purchase Zedikers book: Top-Grad Ammo. It is all there.

[S.A. Boggs]

One thing I like about the G3 is that it will take just about anything. 40 some years ago I purchased an HK-91, my buddy scoffed at me and bought an early M1A. My buddy also bought a bunch of reloads @.10 each, I had surplus. @ the range his rifle wouldn't chamber a round, neck sized only it appeared. As I had .15 in mine I traded him accordingly and smiled as he complained that it should have been round for round. I shot all of his reloads without a hitch and was able to recover some of the brass to reload, my surplus was Berdain.
As you stated, each rifle is different and has to be treated accordingly.
Sam

[togor]

I have a Gewehr 43 that does not get shot much, but when I do I use .30-06 brass that is resized to a long 8mm case, on account of the fact that the action easily closes on a field gauge--a common condition I am told in this pattern. Putting what JohnMOhio says into action.