Need help with a TAC 15

[The Lizard]

I am an avid bow hunter so i have no experiencewith crossbows however I got a TAC 15 for my dad -- we have been through four scopes and cannot keep a pattern--it will shoot three or four shots tight then start wnadering two foot left then two foot high then two foot low at 20 and 30 yards-- we have the scope that is recomended to use with it and sent it back to get a new one thinking it was defective then a red dot then a crossbow scope with the four crosshairs they each do the exact same thing i have checked the loop, arrow notching and all arrows throughly--PSE says its the scope and shooter but cant be after four scopes-- and the diff is too drastic -- not like its 5 inches off at 20 yards its two feet--can anyone offer me some advice or opinions please

[BGfisher]

I don't know the crossbow you're speaking of, but having that many sights on it, all doing the same thing, I'd have to think it's the mount. It's not a plastic mount is it? Tear it apart and find the problem.

[roosclan]

I don't know much about crossbows, but when my rifle did something similar, it was the scope mount that was the problem. Get a better scope mount and see if that fixes it. If not, have someone else shoot it as a way of eliminating the shooter as the issue. If everyone has the same problem and the scope and mount are good, then it must be the crossbow.

Did you buy the upper, or the entire crossbow? If just the upper, make sure it sits tight on your AR15 lower, it might be sloppy. Sloppy mating between the upper and lower receivers on ar-15 rifles can cause accuracy issues, so my guess is that it could do the same thing with a crossbow upper.