No sport using a scoped rifle at 20 feet? How does one forecast how far his shot will be on any given situation?
Some guns don't even come with open sights. My slug barrel has a cantilever scope mount attached to the barrel. That's all. It's either scope it or no sighting whatsoever.
Handguns and modern centerfire rifles are banned at Aberdeen. Only muzzle-loaders and shotguns can be used for deer hunting.
I comprehend your wanting to challenge yourself. But there are many reasons why hunters equip their guns with scopes.
Fire up the grill! Deer hunting IS NOT catch and release.