The advent of smokeless powder made for a busy time. Some cartridges went smokeless. Others passed from common use.
The .32 Winchester Special was designed for black powder use after the .30 Winchester went to smokeless powder. And it was popular in some areas.

And the various .32 and .38 revolver cartridges from Colt/S&W? An old woman asking for a box of .38s can give a gun counter guy the heebie jeebies.

"What kind of .38s ma'am"?
".38 Winchester, you dummy"...

But I'm sure there was some form of logic behind all of that?

And 130 years later some are still curious about what a different conformation of brass case can achieve
A few results are interesting...


"Chances Will Be Taken"