It's all about precision of placement for me. I hate wounding animals. My eyes are getting worse, so I lean towards scopes now, for all ranges. However, I've killed deer out to 90 yds with open sights, but where I hunt, that's a longish shot. I've used irons out to 500 in competition, but a bad shot only costs points. Where I hunt, a 30 yard shot is more likely than a 200 yard shot, and I'll probably shoot through brush and will need to pick a lane. For these reasons, all of my hunting rifles are scoped.