The reason for purchasing Premium ammo from any manufacturer is to match the correct bullet to the game you are hunting. If you are only hunting whitetail or mule deer just about any factory loading will do the trick if you choose an appropriate bullet weight. Premium ammo loaded with controlled expansion bullets is usually not the most accurate ammo for any particular firearm. If your rifle is as accurate as stated with the Winchester ammo, I would stick with it for deer. If you move up to elk or moose I would spend the extra money for a Premium loading with a controlled expansion bullet. Do not turn away from premium ammo because you have had good accuracy success on paper. At least wait until you have tried it and had good results on the game animal you are hunting.