i have beaten the part where u need to hit him with fire arrows. so now he is on the higher ledge where he throws dinamite. everyone says shoot the dinamite when he throws it in the air. sometimes i hit them but ill be really close to beating him, and then he will throw one and there is no chance of living.. any tips?

What you should do if you haven't already get all the upgrades available like the more slots of whiskey in your bottle and the fast-reloading upgrades and finally the damage upgrades, after that you have to shoot Magruder's sticks of dynamite to make the cave collapse on him and you win. Try to dodge the dynamite he throws, optomism is the answer just don't give up, I passed it like in my twentieth try. Also if you beat the game 100% you will get something so AWESOME!!

Also run and hide behind the rocks, don't stay in one place.