The mount you use has a lot to do with a scope's survival on a heavy caliber handgun. 3 or 4 rings on a solid base are needed. If using 3 you really need 2 in front of the turret as the angular upward force exerted is greater away from the hands. Also I suggest that the scope turret be pressed tightly forward against the rings so the scope cannot slide forward under recoil. As always, cleaning all surfaces with alcohol and all screws and threaded holes is critical. I also suggest Loctite on the sides of the screws. Never in the blind holes as it may keep screws from fully seating. A poor mounting job has doomed many good scopes to fail.