Ryan Pierce who built the rifle pictured above, builds a couple hundred big magnums a year. After seeing his rifles trash a bunch of scopes, including those from NF, he found the K524 to be the one that lasted. Ryan epoxy beds scopes in the rings for a completely stress free mount. He uses the method documented by Jim See. The K525 came out last August/September. I got one of the first and mounted it on the 28N after the rifle sent two other brand new scopes back to their respective manufacturers (neither was a NF). While the K525i is too new to have established a track record from exhaustive use, I've been confident in mine. I personally know of two more on light weight magnums, another 28 Nosler and a 300 Norma Improved and have known scads of guys shooting them, albeit on relatively heavy, light to moderate recoiling rifles, at PRS matches.
While I can't speak to it's durability, the features of the 4-16x42 F1 ATACR put it on my short list as a choice for a LR hunting rifle.
I'm sour on S&B as a result of their US customer service situation. I refuse to deal with it again, particularly when there are so many other less excruciating options. Further, S&B's offerings are far from trouble free.
