I purchased this ring set to use in a 2,500-3,000 yard tactical format competition. I mounted up a 12x42 NXS in the rings, and screwed it tight to one of my .338-.408's. I wanted to have the magnification capability of 42X, and still be able to have enough moa to get on target. Rings works flawlessly. I have since replaced the NXS with a Schmidt & Bender, so I'm offering these rings for sale here. They have been used one time, and have not been lapped. New purchase price was $525.00. LRH price is $475.00 shipped.