Whatever factory ammo you buy, make sure it will function in your rifle! I reload, but due to not being able to find the components I use, I only had 7 rounds to take to Idaho last season. So I bought a box of factory shells at Cabela's on the way, as a "just in case", and although they did (just barely) fit into the magazine, they would NOT feed out of it. I shot it to check for zero with the factory ammo, but did it one shell in the rifle at a time.
All good though, one shot from 505yds...done. For a stock rifle, I love my Tikka!