Home Forums Hunting & Shooting Deer Hunting 257 Roberts or 243 Winchester in the Montana

I would opt for the 243 if you are sticking to deer with this gun. The .243 has a great selection of bullets available to the reloader and a plethora of factory ammo available until you get your reloading bench and supplies set up and become proficient. That being said the .257 115 gr Nosler Partition is good enough to build a gun around!