Info on the bolt head: https://www.savageshooters.com/showt...d-for-Valkyrie

As for 110 or Axis, both actions would use the same bolt head so it's really a matter of what you can find and/or want to spend. 110 based rifle will be more expensive going in, but if you can find a used one with a factory hardwood stock you'd be ahead of the game $-wise compared to going with an Axis and purchasing a Boyds laminate stock for it. Just make sure any 110 you get is a centerfeed action as I don't know how feeding would be in the older staggered feed magazines.