Don't take me wrong, I want you to be happy with your 500. Most 500's have 2 beads on the vent rib. If you put any effort into using both beads you will see they shoot a slug accurately enough to defend your home. I can't recommend smoothbores for hunting deer. A rifled barrel is very accurate and most newer 500's are already drilled and tapped for a scope.
Another problem you run into with ghost rings on a shotgun is your eye naturally goes to the center of the ring, which will result in shooting over your target.
"I do not aim with my hand; I aim with my eye. He who aims with his hand has forgotten the face of his father.
I do not shoot with my hand; I shoot with my mind. He who shoots with his hand has forgotten the face of his father.
I do not kill with my gun; I kill with my heart. He who kills with his gun has forgotten the face of his father."
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