I bought a 5 pack of the .40 s&w snap caps.. within 2 weeks of 20 minute daily use my beretta had chewed them litteraly to bits! And whats worse is i now have alluminum shavings everywhere, and worse yet the rim where the bullet meets the case on the snap cap is shaved off and now in my barrel. And since i didnt notice for a while ive got a red alluminum ring down in my chamber thats been stamped in good and proper from loading these snap caps, not only will it not come out with cleaning nor a plastic dental pik. Im going to see the smith tommorow and i already xontacted pachmayer. Anyone care to see if their A zooms are also doing this? I almost bet everyone can at least see the silver on thier snap cap where the bullet meets the case. If its silver check your barrel!