This round seems very interesting to me.  Not only for the long range potential with high BC bullets but for a defensive load with 55 grain projectiles.  I think you should be able to get a nice high MV load in a AR size magazine which defiantly has my interest.

Has anyone seen any published data yet especially for 55 grain bullets?

Tag.  If you are looking for lighter bullets (only), the .22 nosler may have greater potential for speed, due to its greater case capacity.  The .224 valkyrie should be a better choice with heavier bullets since it is shorter and will allow longer OAL with the longer bullets.  I don't believe the 22 nosler can handle the high BC bullets like the 90g SMK.  (speaking to AR mag length loading)

Edit:
Case capacity (velocity) for:
.223 is 31.4g  (3370fps)
.224V is 34.5g
22 Nosler 35.8g  (3500fps)
22-250 is 43g  (3800fps)
These are mostly 24" barrel numbers.

I am aware of all that.  I think a rifle that could shoot the 90 grain bullet to about 1000 yards effectively  and be able to get a 55 grain bullet going say 3600 fps would be perfect without the rebated rim design.  Ideally all done with Varget or similar powder.  Just wanted to see some figures before I buy a barrel.  I also hear  that if you are going to use a 20 inch or 18 barrel 1/7 twist may not be fast enough.

Not sure about the twist rate, seems Larue had good look hitting 1300 in the videos I've seen.
Im waiting load data myself, I've got the itching for a upper to put on my SBR lower... to swap back and forth.

Powder I'd imagine CFE223 would be a good one to go with but want to see some loads others have worked up while I shoot factory ammo.

Looks like Nosler has done some data for the 22 Nosler.  With 1.3g additional case capacity, its maybe close.  I would be very cautious going near the max numbers.  Powders I would try would be CFE223, Varget, XBR8208 and maybe H4350.  The first 3 do well with heavy bullets in .223, and CFE and XBR are used in 6.5g.  H4350 is an interesting powder for 22-250 and .270 with light 90g bullets.  TAC would be something to try for lighter 55-69 (maybe 77) bullets.  Superformance has magic velocity properties in 22-250, but I would not really know how to start to try it in 224V.

https://load-data.nosler.com/load-data/22-nosler/

I went the .22 Nosler round. Haven't shot my build yet and am looking at reloading data. CFE 223 seems to be one of the better ones depending of the grains of the bullet. I have a 100 cases to load. Will probably load 10 from min to max to see what works out. Going to site in since I just got my scope with factory 55g rounds. Hard to tell which will win out the 22 Nosler or .224 Valkyrie. 22 Nosler just requires a barrel and mag change where at the .224 Valkyrie requires those plus different bolt 6.8spc bolt. Although the marketing for the .224 Valkyrie has been a hell of a lot more than the Nosler.

Saw this on savage forum web site....
Valkyrie data