I have one BSA scope, a sweet 17 in my .17MMR Sportster. Love it. Have had no problems with it. Shoots well out to 300 yards, just make the adjustments as needed. I can hit a plastic 20oz soda bottle all day with mine, at 300 yards. That's good enough for me. I shot a fox with it at 80yards, hit it solid, wrong cartridge thou, what a mess. If you shoot a .17HMR leave foxes and rabbits alone, their skin is too thin.