I have a Mueller APV 6-18x44 mounted on my .17hmr CZ 452 and I'm very pleased with it. I'm thinking of getting another Mueller APV 6-18x44 to mount on my .204 Ruger American Predator. Pro's & Con's ? I didn't know if it would stand up to the recoil. Also the Ruger came with factory mounted picatinny rail, So, any idea how to figure what height Burris signature zee rings I would need? Thanks