My brother just had my airgun for a day or two, brought it back and it is shooting about 2 inches to the right, and would not centre. I put an old red dot sight back on, and it was zeroed. Put the scope back on, and it was out again. I have tried everything, taking it out the mounts and starting again etc. Tried centreing the reticle and re-zeroing, but no matter what I do it always shoots 2 inches to the right.
It is a 3-9x50 Hawke Reflex on a .22 lightning.
Thanks for your help in advance!