Ok, the cat's been out of the bag on this one for a while...
... and our illustrious one dropped mention of it in her blog, so I figure I'll explain myself here.
.320 H&R Supermag.
Alright, this is actually not a terrible idea. For starters, take a look at the average new S&W J-frame revolver. They're all the same; regardless of the caliber, they all still have a chamber length the size of the .357 Magnum models.
"Well", I thought, "What would be the benefits of closing up that gap?"
.320 H&R Supermag was born, or at least the idea. All it is, is a .32 H&R Mag elongated to the OAL of a .357 magnum. It doesn't even have to be higher pressure, but it can with the extra powder capacity. Now the *major* benefit here is having no "jump" to the forcing cone.... better consistency.
But, pushing a 100gr hollowpoint to ~1200fps out of a 2" revolver has it's constituencies too.
Some day, I'll have reloading gear....