I bought these rings for my Khales 4-12x50 so I could move my scope between my different T/C prohunter barrels. I have moved the scope a few times now and with just a few adjustments of the scope, the zero is repeatable.
Pros: east to use once mounted, repeatable zero
Cons: was a little difficult to mount the first time
This review was written in the old system and had content requirements that are different than reviews written today.