There are so many options that you could go with on this. .270 win short, 300/300 win short, .308, 30-06, 7mm Any time you drop into the win short category you might not be able to find ammo just anywhere, so make sure you have some stashed everywhere just in case you forget it. I bought a .270 win short this spring and I love this gun. But then again, it's the newest gun I have so therefore it's my favorite. But in a 30-06, 165 grain for whitetails and a 175 or 180 grain for elk would for sure do the trick! Good luck!