Greetings sir! We've actually "met" through others on the site if you will. Your experience and quests are flat amazing.
As I understand it, 1 mil at 100 yards = 3.6 inches. The illuminated circle you see in the reticle image from NF's webpage has a radius of 2 mils at 100 yards. So I do stand corrected, was a late night working up the initial report out. With a diameter of 4 mils, we get 4 x 3.6 inches = 14.4 inches at 100 yards, as you noted ~ 15 MOA @ 100 yards. Thank you for the catch, the questions, and corrections by all means.
At low power you literally have a circle, not a red dot. Totally concur WRT a relatively large diameter red dot obscuring the target. Running it up to 8 power with the F1 reticle gets you into the "red dot" territory on a T-post.
Low end and high end magnification can be seen here toggling between the two settings:
The FC-DMx reticle is an evolution of the FC-DM reticle perfect for Military/Law Enforcement, Competition or hunting.
www.nightforceoptics.com
I am basically totally new to the African safari hunting world, and need to be thinking ~ 50 yards, not 250. With that circle at low power transposed over the kill zone of a buffalo, if I am true and my rifle shoots true as well, I've got a solid hit. No math involved. And as previously noted, I won't be milling anything with this platform. It's more a matter of keep it simple stupid (me in this case), and the secondary reason I like this solution for this application. The primary reason being abject reliability in so much as rifle optics are concerned.
And if I understand your question about 4x power perceived size, the following is listed as FOV low / high power:
Field of View @ 100 yd or m | 1x: 96.1 ft/32.0 m8x: 13.1 ft/4.4 m |
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Red circle surrounding red zone of target cleared hot and let her eat.
The math can overwhelm the conversation sometimes.
Hopefully that helps clear up my initial posting.