AussieLad, I can help you out with 300 Sav brass, have 34 new 300 SAV Win brass and have formed 300 sav from once fired LC 308 Match brass and 308 PPU Serbian brass. Have fired both and work just fine. I also have never fired REM61 pull down MIL brass, good stuff. I have shot hundreds of rounds of it in my M1A .
yours for free. PM info ncgary