I can actually see someone doing this...Their thinking being that the 32-44 cartridge is impossible to find. Therefore the gun is worthless to them...So, why not bore it out to the most common cartridge out there at that time....The .38 Special? .323 to .358 is not a huge increase. That way you can shoot it.... Thinking that he'd worry about the barrel bore later.....So, he performs a sub-par boring of the chambers and like many projects? That's as far as this person got.
I think I've seen more altered cylinder chambers than any other part on Antique guns and always to alter to a more powerful cartridge. Or, a cartridge that is readily available at that time.....
Murph
Yeahh, but...who-ever did the Cylinder bore effort did not even come close to chambering it for .38 Special, they bored straight through, and are way over-size for .38 S & W or for .38 Special, as well as failing to have a 'step' or Cylinder Chamber to Cylinder Bore transition ( leaving aside the Barrel Bore diameter problem ).
Granted, a naive and impetuous person can embark on a project with poor planning and worse understanding, to soon be in some kind of impasse and limbo, and that does happen sometimes...
.380 straight through just makes no sense at all other than maybe, as preparation for sleeves...but, sleeves for what conversion? Given the unique Barrel Bore diameter, nothing else Bullet wise other than .32-44 or .320 RR ( or eventually 8mm Nambu Bullet wise, sort of, ) would fit that Barrel.
As an aside - I have to suppose in theory, that one could have 'Special Ordered' a New Model 3 to be Chambered in .38 Special, at least from 1899 and on from there a ways, and I wonder if any exist?
We do know some ( or at least 1 ) New Model 3s exist in .38 Long Colt, so...might be possible.