Friend of mine has a PSL that cannot hold a group to save its life. The best I could muster was about 5 inch groups at 100 yards. At 300, hitting a man sized target with any consistancy is near impossible. I understand that this is a DMR and not a sniper gun, but I should be able to shoot coffee cup sized groups at 100 yards! Nothing on the gun seems out of whack. Everything is tight, nothing is binding. I tried everything from garbage Egyptian ammo to standard Romy to the uber expensive Russian 7N1 ammo. Nothing seems to improve the shot grouping. He bought the gun new around 2008, it hasnt been boogered with. Ive heard some say to remove the muzzle break, but I dont want to go buggering his gun unless I know its a common problem....