I've experimented with it before, and it is a good platform for handgun cartridge developement. My current project involves necking the 10mm down to 32 caliber to try to get 2000 FPS with 60 grain bullets. But if that doesn't work; then I'm falling back on the slightly larger 7.62 X 39 case for my continuation of this goal. Only I do'nt know how short I'll make it though. On my 10 X 33 on the 7.62x39, it was about the same length as the 44 Magnum. I made my 9 X 39 too long and need to rethink that one. But toneck it down to 32 caliber and shoten it to 1.2 inches might be a nice try. Any comments are greatly appreciated.

You can reform .303 Savage into 7.62 X 39R. I've done that for a single shot rifle I have. It's an easy reform and I use a .308" bullet.

Another fun cartridge is taking .38 LC and reforming it in a .30 Mauser die. I did this for a Martini Cadet ... boy is that a sweet shooter.

What about necking down a 357 or 44 Super Mag case to 32 caliber and loading with 60 grain bullets? I guess it depends on whether or not you want a rimless case for autoloader shooting.

I've considered the 32 X 357 several times because of the plentifull supply of brass. And a 357 Magnum lever gun could be easilly rebarreled. But right now I'm building a pumpaction pistol caliber carbine and I'm trying to make the 32 X 10mm work as a pistol cartridge and also as a cartridge for my carbine. I've been building my own "TOYS" since 1974, and although I've never attempted to get a manufacturers license; I just might if this combo works out.

This can become something of an oxymoron. Around here, there was some real fallout at a local ammunition outfit, over loading the 357 Sig. cartridge. So much so, that part of their team decamped and started a new CNC firm, that seems to specialize in loading equipment, on the professional level. They all still work together, but now under different roofs. The rub is whether to head space an auto loading pistol cartridge with a shoulder, or on the case mouth. Tolerances in auto pistol chambers play hobb here. And loading millions of rounds, means that the brass design can't be any too herky, and still compete in the market place.

Lee Martin (SingleActions.com) has done a .32 caliber based on the .357 Maximum called the .32 Meteor for use in rechambered .30 Carbine Blackhawks. A friend of mine is attempting something similar using 7.62x25mm dies on .357 Magnum brass.