I have one of the older Bushnell rangefinders with a 6X magnification that's probably 20+ years old. It struggles around 400 yards or so but works under that distance. Most of my shots at deer and bear are 250 yards or less because of the general terrain of lots of oak trees. It works for my shot lengths but I am planning on upgrading to a better unit with more distance capability. There are some places where I can see farther and being able to range out to 800 or even a 1,000 yards would be useful so I can plan a stalk, etc. Rangefinders at that range tend to run in the $500 or so range but it's something you can use for life if you take care of it.