I'm thinking of putting a red dot or holographic scope on my Rem 870 slug gun/barrel. I also don't want to spend a lot, maybe $100 or less, but not more than I paid for the gun. The wide range of scopes and costs is overwhelming. How do I compare say a Cabelas Pine Ridge $50-100 to a Bushnell or Aimpoint scope costing a lot more. The same goes for Holographic sites.
Can anyone offer some criteria or a scope? Thanks for your recommendations.