Have been using a leupold vari-x III 2.5x8 that I bought new in 1998 have not had to sight it in since, A 80s williams twilight on my 22 and on my new to me 1957 husky 270 a early 80's burris 2x7 fullfield that I am totally impressed by the quality. I don't think the burris has ever been in the woods I am now looking for another one in 3x9