This is our proprietary skill rating calculation. This has nothing to do with official game ranking or MMR.
The purpose is to show player skill levels relative to other players, not estimate MMR.
Heal for an additional 400 after activating Battle Shout.
Increase your maximum Ammo by 6.
Gain 8% Lifesteal.
Generate 4 Ammo after activating Battle Shout.
Reduce the Cooldown of Battle Shout by 3s.
Increase your Attack Speed by 40%, but reduce your damage-per-shot by 25%.