WELL I HAVE SHOT A LOT OF STUFF IN MY LIFE AND NEVER SEEN ANY THING LIKE IT. I WAS USING THE WEAVER MOUNT SYSTEM ON MY 500. THE SCREWS WERE TIGHTENED DOWN AND LOCK TIGHTED. THE RECOIL FROM THIS GUN TOOK MY BURRIS 2-7 AND FROM THE RECOIL ELONGATED THE SCREW HOLES. IT LIETERALLY STRECHED THE ALUMINUM WHERE THE SCREW HOLES WERE. IT TORE THE BOTTOM PIECE THAT HOLDS IT ON AWAY. THIS WAS CRAZY. MY GUN SMITH IS MAKING ME A MOUNT OUT OF SOLID STEEL. THIS SHOULD SOLVE THE PROBLEM.