According to this, a .44 Mag with wadcutters (or JHP) packs a rating of 136.
http://bushcraftusa.com/forum/showthread.php/15722-Stopping-Power-of-Handgun-Cartridges
In a firefight, I’d rather have an AR-15 in 6.8mm or an AR-10 in .308, with soft point or hollow point ammo.
Those are bogus numbers. . . how can you have a 136 on a scale that only goes to 100? i.e. 100% of the time you can stop a man in a fight situation with one shot. It simply is not possible. These people who make up these numbers are using theoretical numbers based on velocity and bullet weight and NOT the entire SYSTEMIC data which also includes the firearm in the data. Without understanding the involvement of the firearm in the ability to deliver the round to the target, it is meaningless. How would that .44Mag perform if shot our of a 2" barrel? Not as well as if it were shot out of a 4" bbl gun and even better when shot from a 8 3/8" bbl'd firearm. Another consideration is WHAT is the target and its situation? How thick is the body? What distance will the bullet have to traverse? These over 100 numbers do not ever consider any of these data in their numbers that exceed unity. How do you stop someone more than once? As I said, it is not possible.