Originally Posted by
Eurodriver
I have to ask - have you ever set a target out at 600 and seen for yourself if you can see it?
I have threads on here of results I have gotten shooting iron sights at 400 yards. I do feel fortunate to have young eyes, but I don't think they are really that hard to see. A 1/2 IPSC at 600 spray painted white against a green/brown berm is pretty easy to see. I find iron sights easier than red dots for that kind of shooting because you can adjust them. A dot you have to know your hold for elevation and wind - without tickmarks its not easy.
With iron sights you just dial appropriately, and focus on the front sight while the target is blurry. All you really need is enough vision to see a crisp front sight that's ~18" from your face. I have videos somewhere of me shooting long range with a RDS, but I feel like I remembered I had a Gopro and have been spamming the forum with videos so I'll refrain.