Best shootout? ALL OF THEM.
That's like asking about the best pecan pie yo' Grandmomma made? ALL OF THEM. But since you asked us a fun question:
Lately, Open Range, hate that Hollywierd editing gave then 18 shooters though.
Outlaw Josey Wales is just eat up with great various shootouts, no matter how silly that Gatlin gun episode was. I have that movie memorized.
I just don't like the 3:10 to Yuma movie for some reason.
The bar gunfight from Unforgiven may be the best of all.
Of course The Wildbunch and Shane.