I have a Parker buck buster and have the same issues. Try to find the correct bolts on eBay. Or use the half moon and be very diligent about setting your bolts. I shot the half moon for years without any issues
Can’t go wrong with the Barnett headhunters either.....they’ve gone on sale at Wally World, finally! I would have bought more but I have plenty and don’t plan to shoot it much til season again. Unlike a bow, scope needs to stay dead on and form isn’t so important.