I just got a puma in 454 Casull, what a hoot to shoot. I also have a Ruger SRH which I mounted a Red Dot scope. I tried 3 different scopes and the 454 blew them all apart. The #4 scope is a Simmons, 3 years and still shooting it. Had a simmons 2X scope but had trouble aquiring a moving target with the hand gun, am sure that it would be fine on rifle or carbine though.