I'm looking for a .22 rimfire pistol for shooting Steel Challenge. So far, I've distilled my choices down to the Ruger Mk III, 5.5 in, bull barrel, the Buckmark Practical URX and the Buckmark Contour 5,5 URX. I like a fiber optic sight on the front and I know I can do that w/the Mk III and the Practical comes with one. Not sure if a fiber is available for the Contour. I'll probably put a dot on it later, so having the Weaver mount on the Mk III and Contour make it easier. Not sure about the ease of mounting a dot on the Practical. So for you Steel Challenge shooters: what are you using, anything you'd do differently and am I headed in the right direction?