A 36X rifle scope with a 40mm objective will not be like looking through a spotting scope. There's a lot of mechanical difference between the two. That said, Weaver T series are solid light repeatable scopes that are favored by many. I use T24's for silhouette, they are the most reliable that will keep me in the weight restrictions. The glass is so-so, but for the purpose I use them for repeatability trumps clarity.