That IMI stuff is supposed to be pretty hot loaded stuff. Buddy reports it hits 3" higher than Hornady TAP at 100yds, though worth noting TAP is 75gr, and his IMI 855 stuff is 55gr. That's a significant difference though. Anyways, it's supposed to be good stuff, if you want to load up on my m855 type ammo.
The demand is so high right now. I know the last two times I've seen PSA in stock they've sold over 10k boxes(the max you can put on a cart) in under 15 minutes.