I hate Leupold rings and bases.Seldom are they square to each other and usually require lapping if you want to get close to a good fit.

IMHO for the money spent you can't beat Warne Maxima rings and bases. They are a steel Weaver style base (usually two piece) and use vertically split steel rings. They cost what A set of Leupolds cost but are ten times the mounting system.

If you have the money to spend ($100for a set of rings and bases)Talley is the way to go.