The following reflects my experiences only, and each firearm is different, proceed at your own risk.
Factory .38 Super is a semi-rimmed, 9 x 22.5 case.
9 x 23 is rimless.
I've run 9 x 23 through Colt and Kimber .38 Supers, using the factory Super barrel and magazine, with no other changes, without problems.
Ymmv.
I changed over the slide on the two tone in the pic because I was able to purchase a complete Colt 9 x 23 conversion top end for a good price, along with a bunch of dedicated 9 x 23 mags - I was interested to see if there was any duifference in accuracy between running the 23 through the Super chamber, and a barrel chambered specificly for the 23 - and no, I haven't tried running Super through the 23 chamber, but I don't see where it would be a problem.
The link I posted to Burns is really the best single source of info on the 23, and eventually I'll send him one of my Colts for the full treatment.
Factory .38 Super is a semi-rimmed, 9 x 22.5 case.
9 x 23 is rimless.
I've run 9 x 23 through Colt and Kimber .38 Supers, using the factory Super barrel and magazine, with no other changes, without problems.
Ymmv.
I changed over the slide on the two tone in the pic because I was able to purchase a complete Colt 9 x 23 conversion top end for a good price, along with a bunch of dedicated 9 x 23 mags - I was interested to see if there was any duifference in accuracy between running the 23 through the Super chamber, and a barrel chambered specificly for the 23 - and no, I haven't tried running Super through the 23 chamber, but I don't see where it would be a problem.
The link I posted to Burns is really the best single source of info on the 23, and eventually I'll send him one of my Colts for the full treatment.




and here is the gun:




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