Ed,
I've shot the 308 for more than 40 years, and have shot game with a number of different bullets in that cartridge. Because of the moderate velocities that the 308 produces, any of the cup and core bullets will certainly perform more than satisfactorily on mid-sized game, be they Federal, Speer, Hornady, Sierra, or whatever. For your son, whichever 150-gr. bullet his gun shoots accurately is the one I'd go with.
