MOUNT THAT CAN HANDLE GAMO RECOIL

I've been using a UTG 1PC Offset Airgun Mount w/Stop Pin on a GAMO Wildcat Whisper. It was great for about 4 months and then began to move. Checked it out and the stop pin was sheared off from the recoil. Tried moving it up the barrel as I needed more space between me and the scope. Was fine for a couple of shots and then began moving again. GAMO recoil! Anyone know of a mount that does not use the recoil pin but will hold the scope stationary? Thanks.