I've shot some AAC "SABRE BLADE BLACK TIP" 5.56 NATO 62 GRAIN out of my 12.5 AR.
I set zero at 50 yd, POI was an inch high and right vs prior 55 grain I used.
Accuracy was mostly good with an 1 in 5 flyer. Maybe me or gun. Certainly better than most FMJ ammo.
I shot a round into a piece of dry firewood that was not split, 6" diameter, from 35 yards. It did not exit.
I split the wood, got lucky it split right at the bullet. It was very mushroomed and almost all intact.
I found a separate small fragment that had went vertical a good ways.
Pretty crude test, but it was interesting.
Seemed pretty clean, I was shooting suppressed.