The only experience I have had with them is my buddy's NAA Mini .22 Mag. I've shot it only a couple of times, and such a small pistol firing .22 Mags is a handful, to say the least. And the report is deafening if fired without hearing protection. But I guess its better to have a .22 in the hand than a 9mm at home...
Brad
Sounds like I've heard that before. . . . just not with those calibers.