Ingwe: Do you think you could rechamber that Howa to get a fast twist 22/250?
Naw, but you certainly could take the barrel off and put it on a 473 bolt face platform...
that is what I did with a 1 in 7 twist barrel ( Pac Nor) from a 223 and put it on a Ruger 77 SA, that had had a 243 barrel on it from the factory.....that gave me a 243 length magazine with being able to seat bullets out further and increasing the powder capacity..
it runs 80 grain bullets at about 3350 out of a 24 inch stainless barrel... certainly an upgrade to a 22.250...