Just sit somewhere up high where it cant hit you and tranq it, after you knock it out just feed it some mejo Berry's or exceptional kibble good luck hope it helps!

This thing hit me 63 times but I knocked it out using 10 stone arrows and 14 tranq arrows.it took an hour to do.

Narcotic Making Machine...build a Chemistry bench on your bronto and carry spoiled meat on it. Go berry gathering and get all narco berries. Start crafting for thousands of narcotics!!

Just run into a forest until it gets stuck on some trees and the shoot it with tranqs easiest and best way

Go somewhere where the bronto can’t get you then shoot it with tranqs