A couple years ago I was in Montana, jumped out of the truck and got to hiking... got into a spot and started glassing, I found a nice whitetail bedded down on the far hillside, I dropped down into the valley and up over a hill... I found him still bedded and wanted to verify the range... no range finder, I had left it in the truck... I had a choice, I could guestimate range and hope Im on with my shot... or I can get closer and know that Im within 300 yard sweet spot... so I tried to get closer and got busted.... if I had a rangefinder, I would have anchored in out to 500yrds.... I never go anywhere without it