PHWHAT - but apparently both Clark Custom Guns and Colts themselves made these rare 'conversions' for bulls-eye target shooting - and my reading suggests that these 'target' pistols were successful and accurate.
'Automatic .38 Special Mid Range'.
.38 Special Magazine Holds Five Rounds.
The Clark .38" Special guns were built starting with .38" Super barrelled guns and retained the Colt Browning locked breech mechanism (- modified).
- While The Colts pistols were engineered with a (slightly) retarded blow-back system using a floating block.
I'd say that getting the pistols to feed the flat nosed rounds into the chamber would be the really tricky part.. if you can get an auto-pistol to feed wad-cutters you'll get them to feed anything.
- So there you go then, - stranger things have been known to be made to work (Look at 'Desert Eagles!).