I've bought a new blued 605 last year, haven't had any major issues. probably around 700-800 rounds of mixed .357's and .38 specials through it. One thing i did notice is if you ride the trigger between shots the cylinder can feel like it's bound up. letting the trigger return forward between shots is the only way i've found to keep this from happening. it's not a Glock with a short trigger reset, if you shoot it like that you could have problems.
i noticed my groups can get kinda wild when shooting the .357 mags through it, 38's have always been nice tight groups. something i've done a few times is have a friend reload the cylinder with mixed .38's and .357's so i never know what's coming shot by shot. doing it that way i managed to get decent groups, so for me it was just the anticipation of the .357's recoil.
with both the factory rubber grips and my Hogue Monogrip it's a beating on the hands with full power .357 mags. Most of the time i just carry it full of .38 special +P ammo.