ATN Thor 4.5-18X 384x288 Thermal not cheap but I can reach out and touch something at 80-100 yds. Like all shooting it depends on the shooter and the bullets being pushed ballistics. Most of my night shots are under 50 yards and involve coyotes with a .22Mag CCI Mag hollow points. Also pop some coons now and then and the thermal makes finding them up in a tree a breeze. The only flaws I have found with it is the battery and SD card Ports. The covers like to snag on brush etc and pop out and get lost. So I put a strip of duct tape over them.
That all depends on the quality of your scope, which all depends on how much money you want to spend. 100-200 yrds isn't uncommon, with some high end scopes offering built in range finding up to 1k yrds with an effective range of 6-800yrds for several thousand dollars.
My Leatherwood ART-II M-1200 is designed specifically for shooting with N.V. and it is capable of effective shots well past the scoped calibrated dope which is currently 2000 Meters! My ACOG will also function quite nicely with N.V well out to the scoped effective calibration, which is 800 meters shooting 7.62X51 165 grain ballistic tips! Most higher end optics such as Leupold's MK-IV and up, Schmidt & Bender, U.S. Optics, and Nightforce will all handle N.V Shooting just fine, even some of the older Scopes like the original Zeiss, Redfields, Pentax, Bauch & Lomb, Burris, and even Nikon can all shoot well, it all depends on the quality of your N.V!
I have been looking for something really good for night vision but the prices start getting crazy if you want to do fun stuff. Still need a lot of work and research on scopes both NV and daylight.
Something else to consider in NV/Thermal/Day scopes is your primary AO terrain and vegetation. If you are in thick woods or heavy undergrowth vs open Prairie or fields. Can you justify the expense of making long shots when 99% of your shots will be under 150 yards? When there is 50 acres of trees and under brush between you and the target........
