I purchased the base for a WIN model 70 in 338 WIN MAG. Since the rifle has iron sights and the scope I was mounting would travel better in a separate case, it was important to retain the range sighting even after the scope had been removed and reinstalled. And the mount bade, rings and system did just that after being sighted in at 200 yards.
Pros: Manufacturers Specs and Statements
Cons: None worth mentioning
This review was written in the old system and had content requirements that are different than reviews written today.