I had a buddy of mine look at my rifle and found 2 screws loose and the barrel was riding on the stock instead of free floating. I corrected this and went to the range again & still would not shoot failsafe good, federal nosler grouped about 2 1/2", winchester superx 180 silvertip 1 1/2", and hornady light magnum 180 btsp were 3/4" all at 100 yards. Is the nosler group good enough or should i use one of the others? have you guys used any of the others?