1) It sounds like he is already a hunter, with some experience....Picking out a guys gun is a lot like picking out his wife for him....Inless you know what caliber, make, model,finish,barrel...etc....I just would not do it....You are a heck of a guy to think of doing this...possibly you can make a deal with the gunshop to let dad return if its not what he really wants...although he may not want to hurt your feelings by doing so.....

2)All that being said...if he currently has a .270...Consider a 270 WSM...It give him a little more "pop"...but recoil isn't much more than a .270...I sighted in my cousins with 140 Accubonds....three shots a 100...two touching, can cover group with a nickle...Oh yea...its a Browning.....no Boss...