I recently picked up a IJ-70 Russian Mak, along wth two boxes of Hornady Critica Defense HP ammo, and 500 rounds of FMJ for practice. The Hornady HP feeds, cylces and hits to point of aim in this gun. Obviously I haven't shot anyone with it, but I trust Hornady ammo and have no reason to believe that this ammo will be any different than my past experiences with it in other calibers. I don't expect a yard of penetration with it, but some expansion is expected. I am happy with its accuracy and reliability, so worst case scenario, it can't be any worse than ball FMJ ammo...which is probably where I'd end up if the Hornady didn't feed.
I picked up the gun as a "truck gun" that I can leave in the truck and if it gets stolen, I'm not out much and won't cry over it, like I would if one of my custom 1911's got swiped. For this purpose, this gun and ammo combo fits my needs perfectly... (100% reliable, accurate, better than .380 performance and CHEAP)
-Tac