I have a .223 bull barrel for my Handi Survivor. I had just changed barrels and went to sight in.
I have got it to shoot under 1moa by following tips from Mr. Quick and friends (thank you very much)
I shot it using some 55 gr. sp loaded by a friend and it was right on.
I had some Wolf steel 55gr fmj and some Wolf 62gr fmj.
From cool barrel the Wolf 55gr shot 2" left and 1.5" low. The 62gr shot 2" Right and 1" high!
I also had my Mini 14 and have got it to shoot about 2.5moa with some military stuff and it shot even more erratic than the Handi.
Now I have some Wolf Gold brass case in 8mm and .308 that shoots pretty good, but I will never purchase any steel case ammo again.