A friend at work has a Remington 870, 3 1/2 inch magnum shotgun and it's shooting low. He says that it's shooting real low, about 12 inches at 35 yards. So what's the best way to correct this? How does Remington set these guns up from the factory? Do they test fire them and if they are shooting low or high, how do they adjust them? I'm not real knowledgeable on shotguns, unless it's tactical shotguns, I was just trying to help a friend out. Thanks for any info or suggestions you guys can provide! I am planning to loan him a set of Tru-glos to test out with his gun. He may just buy a pair if he likes mine. But he and I both were still interested how this problem was taken care of. Thanks again! AKATTACK