I have been reloading some rounds for the 223 and cant get it shoot very well at 200yds,but at 50 it will group a clover leaf or better.so i started checking every thing i know(which isn't much)to get better accuracy like, lapping the barrel checking the crown ,bigger hinge pin, sanding the frame back a little so it is not tight on the barrel, different bases and ring,new scope. Chanced powders and bullets,and oal.while i was changing the length i got mad and built 5 rounds bigger than the go no go gauge.this makes the round 2.342 oal. It touches the land in the rifle .so i went out and shot it AT 50 yds same TIGHT group then i moved to 200 shot for a group on PIECE OF 4x4 card board it was low but a 2 1/4 in. Group.So i backed it off to 2.338 and tryed that and it was terriable 6" group at 200 yds. So i know the bullet is not suposed to tougch the riflings but why does it shoot so much better when it does.oh and their has been 210 rounds though the gun plus 5 touching the rifling.any help is greatly accepted and appreciated.