I have a smith and wesson 638. I would not be comfortable shooting it past 15 yards. If I shoot at 15 yards (offhand, staging DA trigger or single action) I can make 5 shot groups that are about 3-4 inches. However, these groups are always about a foot high. I want some advice on what to line up with what as far as height on j frame sights. I WANT to be comfortable shooting it out to 25 yards. If you look down that groove, there is a lot going on. Please don't respond with "this is a 5 yard gun, bla bla bla." I want it to be more than a 5 yard gun. I know some people can do it, and I'm willing to practice a lot with it. Thanks!