Just one question. Do you have any trouble extracting after firing? Any case will expand to the size of the chamber. As long as you can easely extract the case you don't have a problem. Just check the length and as long as they don't grow past max. length Your ok. There is no way brass can expand after you extract from the chamber. Your GA chamber is to thier specs. You should also use a paper clip with a small 90% bend to check inside the cases for cracking. You will notice gross ovl before you feel any crack. As long as you use the same gun you shouldn't have a problem.
Good luck.
James
