Nightforce - great results. Holds zero in terrible conditions
However, regarding Optics. Some key features to look at
>the more lenses, the more fail points for holding zero
>durability, fixed will be better than variable
>optical clarity, contingent on how lens quality and lens alignment and less number of lens (aka most expensive for variable)
>fixed and less lens, less light split, more light transmission (clarity)
>Reticle issues for variable scopes: consider your ranging reticle and units you need (mil/moa) and precision you need. Your reticle needs to be the first focal point, first plane. (in variable scopes, fixed doesnt matter). If its not first, the ranging reticle in the variable scope in a second plane the picture and the reticle will not change together, rendering the ranging reticle useless. If its in the first plane, the reticle will change proportional to the picture. Second plane reticles are common in varmint scopes (range not needed, no mil/moa needed).
>Mag Consistency: Most Military pick fixed for consistency, which is key for repeated results in ranging environments. relatable: think hunting.
>Field of View - the higher the mag, the smaller the picture
These all lend to a fixed scope. A $1k fixed is going to be a world class scope (general), while an equal $1k value variable is going to be low on the quality. If you want variable, you should be prepared to spend some coin.
Some Mag suggestions:
Military Preference, Sniper Etc
Straight 10x = 100 - 1200 meters, no need for higher
Effective overall, slightly limited field of view at max range
Extreme Ranges
1000 - 2000+ Meters
Maybe 16x, requires HIGH quality glass, $$$$
Police and SWAT Type
100 or less meters average range
Varmint style scopes, 2nd focal plane not a hindrance.
Variable Power
Long Range Hunting
Large Game - 6 to 10x straight
Medium Game, Moving Game - Fixed 4x, maybe 10x for Large moving
Varmint, Coyote, Etc Moving - 4x or 6x fixed