These guns are just way too much fun. I picked this one up years ago, now it seems they're impossible to find. The "Earl" model is the same as the cartridge gun minus the cylinder (which doesn't swap with normal NAA cylinders, so don't try it). Out to about 15-20 yards, I always got very respectable groups from this 4" barrel due to the (actually pretty great) sights. 5grains or so of Pyrodex P and a 29gr .22 short conical gets you right on the money, basically point of aim.