If your pellet gun is a spring piston style it has double recoil which can play havoc on and destroy even very high quality scopes
. If it is a double recoil model airgun, you will need a scope that is rated for that style of recoil. If you let me know the model name of your BSA
scope I can check for you. If its not rated for it, you can pick up a model that is that isn't too pricey for a general plinker.