i shot two foxes last week with mine, one at 40 yards the other at around 140 yards, in truth mine is good but needs more magnification, I think 200 yd is maximum for a accurate shot, I like mine for sitting out and waiting on dusk, I originally bought it to stick on my 22 hornet, but found I used the hornet too much in day light, so mounted it on my Remi 223, you can pick things up at a serious distance depending on the conditions, very good for lamp shy foxes, and I think that's where the benefit is for me,by the time you have bought one, bought the reach forward mount, fit a picatinny rail,