I don't have a 22 but do have a 20" 6mm Grendel, with 95 grain bullets I can hit 2650 without pressure signs.
If it were me, I'd wait for the .224 Valkyrie, you'll have cheaper reloading die cost, factory ammo available in four flavors as of this moment and possibly cheaper brass. The only down side that I see is right now its just FC making brass & ammo, but the chamber has already been saami approved so we will likely be seeing other cartridge companies rolling out product shortly. And more than one barrel manufacturer is getting mid to high 2600's with FGMM with 90 grain bullets in a 20" barrel I'd see no reason why 2800 wouldn't be obtainable with 80's and very likely higher. As a data point my 21.75" long throated 223 bolt rifle will launch 80's at 2750 with ease.