I've only ran the Berger 130 HVLD in my GAP so far. 63.0 of H 1000 gets me 3250 with no pressure signs. Hornady brass, F215, 24", 8 twist Bartlein Barrel. (.81 free bore) I'm going to try the 140 HVLD. I got some Retumbo to fool around with also. Hope you didn't get a bad barrel Shep