Nwill see how fast he can range but ot sure if this is right section as my son won't be starting out long range but will see how fast he can move there. Ok So here is my question, my grandfather just gave him/me two actions. One is a Rem 600 mohawk, the other is a rem 600. Now I own a couple 600's one being a rare 600 223, other being a 350 rem mag. Both great shooters. My question is what caliber rifle should I build for him? Since both are 308 bolt face I thought what better choice then to start him with a .243? Now my next question for the 243 would be what length barrel and contour should I go with? I will probably carry it for him for a while so should I just go with a 24" barrel or something a little shorter? I want it to be some what heavy to absorb some of the recoil. Second question is what do I build for second rifle? Something bigger for when he grows out ofn the short stock? Don't want to make him recoil sensitive. Was thinking 7mm-08?