Ok I have been having problems with my 7mag not extracting brass. So I had a m16 mini extractor installed. Now i can shoot open the bolt like pivot it up to pull back but can’t pull the bolt back have to use cleaning rod to get it open. Now my question is if it was pressure wouldn’t I have heavy bolt lift when first starting to open the bolt or lifting the bolt not pulling it back. This same load never used to be an issue. Barrel is a criterion remage, 430 total rounds, only 9 rounds since I cleaned it last. This is with adg brass, been fired few times. Any ideas would be great.