Scope eye can get pretty nasty
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Yes it can. A friend of mine got hit by a 12 gauge muzzleloader scope twice in one day. We were shooting in a still target competition.
The first time it happened it hurt him pretty bad, and the second time he passed completely out.
I got up over him with a towel to stop the blood and started talking to him in order to get him to wake up. He slowly came to and looked up at me. First words out of his mouth were, "I, I, I don't think I want to shoot muzzleloader anymore."