Question: red dead redemption 2 how to upgrade dead eye?
Answer: Skin Large Animals. Skinning an animal is one of the easiest ways to obtain Dead Eye XP since it doesn't impact honor and it doesn't require any materials beyond a bow and maybe some bullets. ... 
Headshots with Free-Aim. ... 
Crafting Tonics and Cooking Food. ... 
Valerian Root. ... 
Complete Challenges.