Our military adopting the Grendel?

[stanc]

This to me is a bit stunning. Not that I don't believe it, just that even M262 ballistics are getting pretty wimpy past 500 yds, much less 750. At 500 yards it's roughly the same as .22 mag muzzle velocity.

I agree. If they really were making 750-yard, first-round incapacitation shots with Mk262, I think it'd have to be due to shot placement, not wounding capability of the 77gr SMK bullet.

IIRC, Mk262 MV is only 2700 fps or so from a 20" barrel. That would translate to ~2500 fps in the M4 carbine's 14.5" barrel. At distances beyond about 300 yards, MatchKings don't fragment in gel tests.

FWIW, Gary Roberts says that at extended ranges, most all military spitzer bullets produce about the same wound profiles, regardless of caliber. It's at 0-300 yards where differences are noticeable.

FYI: