I cant help but jump into this one. I have owned a FiveseveN for almost 2 years and have tested it heavily. When I first bought it I knew very little about it other than it fired a 28gr bullet that goes 2100 fps and is designed to tumble shortly after impact. I heard all the hype and had to put it to the test myself.
My testing along with hundreds of others (yes I said hundreds, check out fivesvenforum.com) have confirmed the validity and stopping power of this round. When the ps-90 or 57 are loaded with SS195, SS192 or SS190 it does exactly what is says it does. The above projectiles are over 1" tall and tumble end over end, side over side, normally creating at least a 1" diameter hole for roughly 8-14" inches of penetration. In other words, yes it is very lethal.
read my post (same screen name) post # 8 and you will see what I mean.
http://fivesevenforum.net/showthread.php?t=11072Nice knife by the way!