Years ago, I went to sell my .38 super. What to do with 250 rnds of my reloads...so I checked fit in my .38/.357's. They chambered in a little less than half of my S&W's.

Point is, even for same mfg, chamber sizes vary;and sometimes, not just a little.

No, never had to use the supers in my 38/357's. A short time after selling my EAA Tanfolio, a deal I couldn't refuse for a .38super 1911 came my way.