Have an AR with a barrel of about 12.5 inches long. It was horribly inaccurate until a gunsmith found corrosion at the very, very end of the barrel. I couldn't see the corrosion because it's hidden at the other end of the permanently-attached muzzle device. Before the gunsmith removed the corrosion, the rifle couldn't print five shots into a six-inch circle from 33 yards. After the corrosion was removed, the 'smith says he put four shots into a one-inch circle from 25 yards. Another member here and I took the rifle out, sighted it in at 25-some yards and then went for 100-yard groups. He did the shooting; he was able to get "minute of enemy torso" groups across several attempts but nothing less than three inches. He believes the short barrel is the problem. I'm thinking the problem is still the corrosion: Some may still be there and still be screwing-up the trajectory.
I have a rifle with the A2 stock, which has a lead slug in the butt. Have another with the 1005 Tactical two-stage trigger. I'm thinking I'll cobble these together and come-up with a stocked rifle with a two-stage trigger. I'll rest the rifle in my Sinclair machine rest and rear bunny bag. If the weather ever warms-up around here, we'll somehow find the time to go out there again and try again.
I have a rifle with the A2 stock, which has a lead slug in the butt. Have another with the 1005 Tactical two-stage trigger. I'm thinking I'll cobble these together and come-up with a stocked rifle with a two-stage trigger. I'll rest the rifle in my Sinclair machine rest and rear bunny bag. If the weather ever warms-up around here, we'll somehow find the time to go out there again and try again.