I mounted a Burris 2-7X in a Weaver base with unlapped Burris Z rings on my 14" 44 Mag barrel and the scope broke within 10 rounds. I now have a Nikon 2X, in the same rings, on that barrel, and it's still going strong. I prefer the Nikon 2X to a Leupold 2X, its brighter and has a larger field of view.
Greg