SMKs out of mine at 27xx FPS into an 8" wall of blow sand (very fine) at 200 yds penetrates about 5". A 3 shot group will pass through though, if the sand is at all moist.
The remains looks absolutely devastating, no fragmenting, just one heck of a hunk of shrapnel.
I only had 6 of the AL tips and loaded them so that a loaded round could be ejected. I don't know how far back they were. For all practical purposes, the single 3 shot group I shot after using 3 to get the correct powder charge, went just a bit bigger than what is expected of the SMKs. Just under 0.7 MOA @ 200 yds.
Average velocity for the 3 shot group was 2896 FPS with a bigger ES than I want. Was using US-869
I'll have 100 on the way next week.
I may be the slowest guy on the mountain . . . . but . . . . I'm on the mountain!