I have all three model's you mentioned. Actually the Model 63 is the stainless steel version of the old Model 34 Kit gun. My Bearcat was one of the last produced in the original series when the trigger guard was steel instead of anodized alumnium. All have been used extensively hunting small rodents and varmits. Actually won a bet against another hunter who used a rifle vs my pistol who could take the most gophers so both are accurate. Mostly a toss up as to which one I like better as all three shoot well, have decent trigger pulls and are plain fun to shoot.