How far are you (realistically) going to shoot an elk with a 6.5 Creedmoor? Deer? Probably further for a deer. My first thought for a lightweight and bright hunting optic is the Razor HD LH in either 2-10 or 3-15. 3-15 has parallax but no illumination. SFP makes illumination less needed in my opinion, even at dusk. Night hunting is completely different but I don't hunt deer at night.
It sounds like you're trying to build a rifle that's light that you can hunt and shoot targets with. In that case, the NX8 sounds great. But if it's a true hunting rifle (shot enough to be confident throughout the year, resulting in only a couple shots on game) then a lightweight SFP scope that you're confident in makes more sense. Know your dope (or write it on a card and tape to your stock) for 3x, 5x, 10x, and 15x and you should be good! I find I like a lot less magnification for hunting live targets. 1x per 100 yards is a rule of thumb that works well for me, especially on elk size animals.
Now, if this scope was going on something that was a 300 mag or larger, getting a scope that can dial to longer ranges (500+) makes sense in my mind because of the amount of energy they keep at distance. But realistically, dope to 500 yds is usually pretty easy with a 200 yard zero.
Just my 2 cents
