Re: Adj Objective necessary?
Not gospel but what I "think" I know.
Fixed power and scopes w/o AO are set to be parallax free at a specific distance. Having said that I've made some long shots with a Leupold VX II 2x9 but not over 425 yards.
With the Super Sniper 10X and 16X and the Weaver Tactical the AO is a must at ranges up to 1K, which is as far as I am able to shoot due to range length.
My short answer would be, yes.
I may be the slowest guy on the mountain . . . . but . . . . I'm on the mountain!