recently purchased a 111 package in 300 win mag. this is a dbm, non accutrigger version, long action with the 5.06 spacing of action screws.. i want to order a barrel for it but do not know what shank it is, as i dont have the barrel off yet nor do i have a nut wrench yet to do this. what shank is this? please help so i can get my barrel on its way