This is an entirely different game from Boot Hill Third edition.
This has the best Wild West combat I've ever encountered; it's very deadly.
To attack, I have a percent chance I need to roll under to hit. If I hit, I roll on the Wound chart twice; once to see what body part got hit, another to see how bad it is. Regardless of your level, an unlucky hit can kill you instantly.
The rulebook assumes you'll be playing a game similar to the old Braunstein games of yesteryear. Everyone creates a character who has a role in the town/terrority; Texas Ranger, Sheriff, Marshell, Indian Chief, Railroad Boss, Newspaper Owner, Outlaw Gang leader, drifter, etc. Everyone is viaing to make such and such amount of money, and the referee just moderates the chaos.
This blog post here has a description of one Game Master's experience with Boot Hill 2nd Edition.