Quote Originally Posted by J.Baker View Post
If you're reloading brass that was last fired in that same rifle, no. If you're reloading brass that was fired in another make/model rifle you may have to depending on that other rifles chamber dimensions.

Typically (in my experience at least) the only time you need to use a small base die is when reloading cases for one gun that were previously fired in another - usually a semi-auto. You do want to FL size anything you feed into a semi-auto though to ensure reliable feeding.
Thank you,
Barney