Good find on the Automag! Looks like Hi-Standard is making them for MSRP $500.00
http://pistolbuyersguide.com/Articles.php?action=detail&g=content1245487561Pretty cool, but kind of a monsterous looking thing. I believe I'd lean toward the Blackhawk.
I agree on .30 carbine being underpowered for use as an assault weapon. But it IS throwing at least twice as big a bullet as the 5.7 at the same velocity (
slightly higher if we're being picky).
Looking at the roll of the .22 magnum through history (& yes I love this round enough that I bought my second bolt rifle of this caliber 2 weeks ago), I believe its main use was for stuff like hunting rabbits, squirrel, coon, ground hogs, even fox's & coyotes under 200 yards, sort of stuff I've always used mine for anyway. Ballistically speaking the 5.7 is nearly indestiguishable from .22 magnum. Where's the confusion on its applications?
The "nich" for this caliber would be that
it's new. It's reloadable. And for two - three times the cost you get slightly better reliability with it being center-fire (I cant remember ever having a .22 magnum fail to fire in the 25 years I've used them, but I've never had a semi-auto).

5.7's kinda like the new fat girl in the room. They need love to.

I've already got .22's, & a Pink Panther, so she's all yours!