I recently pickup up a weatherby mark V 7MM Mag at a auction for a good price, and had the intention of having it re-chambered and barreled. The problem is I'm not sure what caliber I want to rechamber it for. I don't want to have to change anything in the action (i.e. bolt face, rails, etc.) I already have a 7MM Mag and don't really need another one, so any suggestions on caliber, barrel length, and contour would be great.