I have an atn 4k pro 3x14 with a sniperhog 66lrx 850nm 1350mw light .. I have done everything possible that i am aware of to maximize this combination .. When the light is set on tight spot full intensity i can barely see 300 yards .. (Daylight measured w/sig rangefinder) .. The distance is shorter when the light is fanned out on flood .. It seems the scopes ability comes to an end at 300 yds .. Its very difficult to id a coyote at 300 yards ..
The same light set the same way on a photon rt 6x12x50s i can see and id coyotes at 500 to 600 yards .. Once again daylight measured with a sig sauer rangefinder ..
If you can figure out how to get 400+ yards of night range out of that atn 4k pro let me know how you did it because i want better results also .. Thanks ... Bob ..