I just purchased a Nikon Black 1000 6-24x50 MOA with 30 mm tube for long range shooting/hunting. I was warned by some folks at a Major chain sporting goods store that this scope would not hold up to large calibers. That the scope would not hold its adjustments. I have been using an older Monarch Nikon for years and have subjected it to a lot more then just recoil. I mount it on the front of a 4 wheeler and drive through the Blue Mountains of Oregon. I have never seen it get knocked of adjustment. I called Nikon and they told me that they have this scope mounted on BMG 50s and it holds. So I have it mounted on a .338LM and will let you know. I was wondering if anyone else had any experience with this scope on big magnums. By the way it is not a $2k scope it is under a grand. The optics are as good as any out there to my eye. I used Nikon glass for decades in my professional cameras.