S&W 610, 4" barrel Took it out and it shoots to point of aim and is a tack driver. Now I need to shoot some 40 S&W through it and see how that goes, though from what I've heard, accuracy should be the same. Why 10mm? Well, I have a number of autos in that caliber, and I like to reload it. It's very versatile. And since the 610 shoots both calibers, it's even more versatile. Trigger action is decent, but needs to be better. DA pull is a little much for my taste, also.