.224 Valkyrie? Future competitor to the 6.5 Grendel?

[StoneHendge]

Now that we know the 90 gr SMK with a G7 of .256 will be the factory offering why do they keep flogging the "supersonic to 1300" meme? I come up with the 90 gr launched at 2700 going subsonic at around 1150 at sea level at 59 degrees F.

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Sure, it will stay supersonic to around 1350 in my parts, but a 22lr will stay supersonic to 1300 yards if you go high enough.