WW2 guns that were military-converted from .38 S&W to .38 Special
The military didn't convert any of them.
U.S. importers converted them following WWII when they brought them back into the country.
And in the process, butchered the chambers.
The 38/200 (.38 S&W) chambers measure .386" and the chamber throats measure .361".
.38 Special chambers measure .380" and the chamber throats measure .358".
Brass will expand in the oversize chamber remnants, and come out of the gun with a bulge where the old big chamber ends and the new smaller chamber starts.
Then too, the smallerr .38 Spl bullet will rattle through the throats, and not fit the bore.
Leading & less then normal accuracy will result.
If you want a .38 Spl Victory Model, then save your money for one.
If you want a good old .38 Special to shoot, get a good old M&P for about half what a screwed up K-200 British will cost.
rc