I have a set of Optilock on one of my rifles and they are nice but the only thing is that they set the scope a little high. The lowest rings will handle up to 56 size objective lens. You can also get Leupold rings but I have no experience with them and have never seen any. I also have a set of Conetrol rings on another rifle and this set bring the scope nice and low especially if you have 40 mm obj. lens. Once you have your scope set properly and secure you’ll keep in mind but will chalk it up as another learning experience...