Hello all. Loads like Rem GS and Fed HS and all standard FMJ's shoot fine with no failures out of my 3at. But I want to use corbon's 90 jhp(not dpx), but those snappy suckers seem to get hung up and wont extract. At least twice a mag has been my experience so far. When you check the gun, the spent shell is still in chamber with the next round jammed up behind it. The gun is about 4 years old, maybe 500 rounds through it. Do I need a new recoil spring to handle the extra velocity of the corbon? I see the recent thread about the new wolff springs. If I do a new one, am I better off with a standard 11lb spring or do I need a heavier one? Any help would be much appreciated.