Here is the deal...
Does your bro own a .38 or .357 magnum? Well, going with the .358 would allow him to shoot pistol bullets and cast bullets in both rifle and handgun. Then there are those very cool Marlin 1894s in .357...
Think about going to a long action so you can seat bullets optimally. Not getting much out of the short mag if your bullet is seated below the shoulder.
Really, the .35 Whelen or .35/284 has more to offer, especially an AI'd Whelen. Having owned one, I'm a bit partial...
If I didn't live in Alaska, where the .357 is about useless for woods carry, I would simplify my life a whole bunch with the AI Whelen and .357 combo. About all you would need in the lower 48, no matter where you live.
