Is it good for the first cold round and then does it get worse as you shoot each subsequent round?
Have you very carefully inspected the sight mounting on the rear sight?
Look for looseness in left right adjustor.
It you have a scope did a smith mount it or did you?
It's the barrel that's crap. When it heats up the bullets go flying every which way. The problem is that in South Texas it is always hot. I can barely get two bullets to group, and if I get three it's time for a party. God knows where the bullets go after 150 yards.
I have several friends who had their Mini-30 and Mini-14 rifles re-barreled and the rifles were turned into accurate, useful firearms. It's just a shame that you have to spend $500 on a brand new rifle and then toss in at least that much more to make it accurate.
No business for Ruger from me.