I shot a .300 Win Mag till last year. I have a 30-06 now. I have new Leupold bases and rings on it. The main issue I had with alot of them is they move a random amount when you adjust them. Like 4 clicks should be 1in at 100yds but it might actually move 1/4in or 2in so if you swap ammo it is a guessing game at the range to get the scope reset for it.