The 338-308 wildcat has been around along time and except for a very few people no one has even heard of it. I saw 1 about 20 years ago that owned by a guy who built wildcats mainly to see what they would do but I never shot it.
The 338 Fed isn't bringing anything to the table that the 358 Win can't but American hunters seem to love338's and hate 35's so maybe it will catch on. If it does the more main stream rifle company's will need to chamber it. Nothing against Sako but they don't selllike Remington, Ruger or Savage.
Personally I wouldrather have Federal sell ammo for my 338-06(yea I like 338's better than 35's

thandomesticating an obscure wildcat.