Questor---I have the same barrel in stainless----so far, I have not found ANY brand of bullet in 50 to 55 grains that will NOT shoot 1/2 inch or better at 100 yd-----have tried Sierra, Nosler, Hornaday, Speer, and Dogtown(Midway). Either your barrel is screwed up (maybe crown?) or scope, scope base, or rings are loose. If all variables have been eliminated, send it back to T/C. I have never had a bad barrel, but I guess others have. pg