I mounted one on a Model 722 in .308 that had the barrel trimmed down to 21 inches, after having a heavy duplex reticle installed by Leupold. My shots are all in the 100-yards-or-less category in the swamps and forest clearings of south Georgia. The HD works great in this type of terrain. The scope fits the rifle well, and works great for my type of hunting. I' m completely satisfied with it. YMMV.