Why can’t they use a very slim cartridge that’s longer, and
put 8 cartridges in the revolver? Wouldn’t the longer casing allow the thinner bullet to go faster as long as there was similar amount of explosives behind it?
I don’t know, I would like to see a ballistic gel test!
The next variables are barrel length and the overall size (and portability) of the gun. In order to optimize the ballistics of a cartridge you describe that looks something like, say, a .30 Carbine or (lemme think for a minute)... yeah, sure, why not, a 7.62x39, you start needing more barrel length.
This is impractical in a revolver. Notice that you find some of the fancy single-shot handguns in almost all rifle calibers, but revolvers are found (typically) in rimmed handgun cartridges that do what you'd expect a handgun to do, in a weapon the size of a handgun.
The Model Blackhawk in 327 Federal Magnum has a 5 1/2”
barrel and overall length of 11.38”.
It weighs 48 oz., holds eight rounds.
Not for concealed carry.
You mean like the article said?