I know there is a post telling you how to measure ring height, and I understand the equation. The challenge I have is that I do not have my base to measure. I have a Remington 700 XCR 223 cal. and I ordered a Badger Ordnance 20 moa. base ( tonight, and would like to order rings also). I plan to put a Nightforce 3.5x15x50mm on my gun. My question is can I use std. Badger rings (.823) or will I have to use med. (.885) rings? I would like to keep my scope as close to the bore as possible. Any help would be appreciated. Thanks, Shane