I let a guy use a Weaver X 1.5 (1977) to take to Africa on a .460 as he could not get what he needed before he left. The gun smith bore sighted it and we went to a local rock quarry to sight it in. and I learned a lot about being Macho. It ain' t all it' s cracked up to be. The scope made it back in one piece, and I still have it.