Doug Im not sure why you'd want to shoot 357's all the time for just a range gun, but if your willing to shoot more of a load of 38specials almost anything will last a life time for you. I have an older python, m19 and a few new 686's (including a new blued 586 that I truely adore shooting). If you must shoot only 357's, Id suggest buying something new with a much longer life span than something old and possibly abused.
OH, I wasn't planning to shoot .357 all the time. Mainly .38 specials. But often I like to take a box of .38+P or .38+P corbon through my gun to test it in recoil an effect on objects. I can shoot those through my current Official Police revolvers but I'd rather not take the chance of wearing down an old nice gun like those. A .357 is built to take such rounds on a regular basis and plus I'd like to be able to shoot the full .357 every now and then to have the full effect of that caliber.