I have in my hands a 7mm Rem Mag 700 barrel and a Mitutoyo dial vernier.Shank is .878" long.Counterbore for the bolt extension is .153 deep. You don't need/want this for a Sako, so facing it off brings the shank length to .725.Quite a simple matter to turn the length to .870 and thread to 1" x 16. Any smith or a good machinist could do this in about an hour, including headspacing it without a reamer as long as you don't care about screw holes or stamping.But most smiths won't install takeoff barrels.Ship it to me, I'll make sure it gets a good home....by the way...what chamber is it?

"after the bullet leaves the barrel it doesn't care what headstamp was on the case"
"The 221 Fireball is what the Hornet could have been had it stayed in school"