Go to post #429 on this thread from Rimfirecentral:
http://www.rimfirecentral.com/forums...232659&page=29 The thread kept these guys busy for about 5 months in 2008-9. The original poster is the inventor of the .22 lr FMJ, or a process, or...something. I've had his site bookmarked for almost 4 years...no sign of activity. He's supposed to be South African. It's interesting to see how the conversation progresses. It digresses a bit at the end, into .22 lr reloading, which we've just finished kicking around here.
*edit* I just found a pic of a box of the military version of the same round:
http://www.talonairgun.com/forum/viewtopic.php?t=18533 The projectiles look pretty long, I'll bet they're the 60 gr range.