Not sure I can help you out too much. Will tell you last year before I came to Iraq, I had a single shot, 7 x 65R that one would be on target, fired two more to make adjustment and one would be like three feet low and one not on the paper, and this was a large cardboard box. After some choice words, I said it is either the scope, the gun or the shooter. The last I buy to a certain point but it was the only gun I could not get a group on. So I took the scope off the muzzle loader and put it on that gun, went to the gun smith, got some advice on reloading, choose some 140 and 150 grain lead, made up about 20 rounds of each and headed back to the range. In two shots I was on, and the five shot groups with both were astounding. All this time it was a certain scope that I had trouble with the same brand in Germany, so I threw it as far as I could, well actually sent it back, it was brand new, to the factory and actually told them to stick it. Anyway, being a single shot, have to wait about 15 minutes in between shots to allow for consistent barrel temp. and I was dead on with 5 through the lungs, quarter size group.

So it could be scope, stock, shooter, etc, etc. It took me almost three years to get mine and enough time to work it out. Now it will more then likely be my go to gun!