No one else believes me, but it seems like you guys do. This is the very reason i dispise 9mm, 40, 45, and all other"service auto" calibers. A good 38, such as your model 15 should be capable of hitting a milk jug a few times with every cylinder at 200 yards. you should be able to hit the sillohette targets police use to train every time at 200 yards, and you should be able to keep all your shots in the "kill zone" of those police targets at 100 yards. We used to shoot an awful lot at 200 yards with 44 mags, and it can be done. i wouldn't shoot a deer at much over 125 yards, as i also dispise optical sights on a revolver, but I don't care a fig about coyotes, and have taken them at extended ranges, as well as missed them plenty, too.
Bullet weith is the key. a 250 grain Keith in 44, a 158 or 172 grain in 38/357, seem to hold up better accuracy wise than the lighter, shorter, bullets. Trans sonic loads also have a problem, but that is another matter altogether. Keep practicing, you will be amazed at how good you can get with a "real" gun.