NEED HELP ! I recently bought a gamo swarm Magnum gen 3 .22 the original scope stopped working after 3 weeks, then I purchased a leapers utg 3-9x40 AO Mill Dot which was regularly 160 bucks, that worked great for the first 200 pellets , I would leave the scope in the same settings and every several shots I would look through the scope and my target would be closer or several shots later it would look further away, I'm assuming from the double recoil the new scope broke also, I had the same issue with the original scope,any suggestions on a sturdy well built scope that can handle the double recoil of this pellet rifle, thanks in advance