I have a Cooper model 21 204 with 3500 to 4000 rounds shot at P-dogs, it shoots as good today as it did the day I got it, maybe better since after 10 years of trying different powders, bullets, and primers I have found its pet load. 27gn Ramshot Tac, 34gn Dogtown bullet, and CCI450, speed is right at 3900fps. It is a single shot, I shoot 100-150 round every day on a P-dog town with it. It gets warm but it hasn't ever gotten hot on me. I figure in a 9 hour day, and 150 round a day, you should have a shot every 3.6 minutes, no reason it should ever get hot, even at 200 rounds a day that would figure to a shot every 2.5 to 2.75 minutes and I wouldn't think that would over heat a barrel. I love my 204, and any other 204 I have shot I wouldn't mind having if I couldn't have the Cooper anymore. Reload for them and cost per round is cheaper then 223. Light recoil, I have seen every P-dog flip through the scope I have hit. I have seen quit a few P-dogs shot at 50-100yrds with a 17hmr and can't recall one flip from them. After learning how to judge wind speed, it is not hard to learn where to hold, and the 204 will produce a consistent and predictable flight path shot after shot in wind. I ranged a shot 8 years ago 478yrds to the base of the mound little P-dog was on boom, my buddy said I can't believe he did a flip he is a mile away, every trip since I make a shot that I know is going to be the best it has made, but the closet one to date was 472yrds. All the P-Dog towns I shoot are rolling hills so a shot longer the 500yrds I unlike. I have a 17hmr, 22mag, .222, .223, .220 Wilson-Arrow, .22-250 that all get at least one P-dog a trip but I guess yea its the 204 for me, no way around it.