Alright, check it out. I have single shot NEF in 223 and I couldnt get it to group but heres what you got to do. First thing i did was free float the barrel. To do that i took the screw off the forearm that holds the stock to the barrel and put an O ring around the stub thats on the barrel, actually I put a couple on. Then you take the scope mount off and clean out the srew holes real good and use some Lock Tite on the srews when you put them back on. I also used the lock tite on the scope rings to keep the scope in place. That will turn your gun into a real shooter.