Need a couple pointers here to confirm my suspicions guys. So load development went great with the new Lapua brass and I settled on 90gr Retumbo and the 300gr Berger Elite. Groups were half moa or less out 1000. After I had 50 pieces fired I neck sized and reloaded. Went to check zero and first round hits a full 2 moa high at 100 yards. Went ahead and fired two more and the groups have now opened up to around 2.5 moa. All three of these rounds showed excessive pressure were as the virgin brass showed none. I stopped there and came home to mesure the once fired brass which was 2.725. These should have been trimmed before the second loadinng and I failed to do so. My question is do you guys believe this to be the problem? Im a little apprehensive to shoot the rest that I have loaded and think I'll just buy another batch and consider my self lucky. I didnt think the brass would stretch that much off one firing and this gun obviously has one hell of a tight chamber. What say you?