Never had any problems with mine used it on 3 different rifles so far a 97k, hw100 and a 95k all been spot on...yeah you got to ajust elevation about 4-6 clicks at 30 yards but thats expected. The Bushnell I use is the second version where you screw the lazer eye down and fully down i may add dont just leave it loose just because its on...maybe thats the problem some people have? maybe? no problems here with my Bushnell Bore Sighteronly ever used on .22 i must add aslo...no problems here, just check your using it correctly is the only advise i can offer.