If you reload at all, load .357 to .38 spec velocity, no ring if not just use a little extra elbow grease when cleaning.
A few months past I got a Model 66 that worked fine with .38 specials, but couldn't get it to load .357 magnum cartridges even though it clearly states on side that it is a ".357 magnum". I thought it a fluke and sold the gun quickly...