I have been debating picking up some of the 223 AE 50g varmint tips currently on sale at PSA for $5.89/20. I picked up a couple boxes at a local shop today to see if they would be any better than FMJ for accuracy. To my surprise, sub MOA from a 16" AR built from random parts.

20 rounds were shot and then reloaded 3 times. 1 time each with 55 Rem FMJ, 52 Hornady HP, 53 VMAX over a stiff charge of AA2520. Primer pockets are still good. Had to ream the light crimp on some, but not all.
Case weight variation of 20pc was 1.2g (91.7g - 92.9g)
Case length 1.7335" - 1.7400"

Couldn't see a reason not to order more.