RE: Why do you use a rangefinder?
I use one, I originally got it for practicing and setting up my targets in my yard.
I don't actually use it when I bow hunt, like say to range an animal before I shoot it. I range a perimeter around my tree stand or blind and take note of where certain landmarks are and how far away they are. That way I don't have to guess at anything. If a deer walks inside that circle I am 100% confident I can kill it.
And I do shoot slow set up. Like over 400 grns in the low 200's.
I also use it when I muzzle loader and slug gun hunt. The difference between 100 and 130 yards is BIG deal depending on what weapon you are shooting and the loads you are using. And I will be honest I can tell the difference between the two bye my eyes.
I even used it once while turkey hunting. I used it the same way I would when deer hunting. I checked the area around me before any birds came in so I knew were my max yardage would be.
Paul