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.
Hitting an enemy with Presence reduces its Cooldown by 5s.
Increase your maximum Ammo by 1.
Increase your maximum Health by 50.
Reduce the Cooldown of Grace by 2s for each enemy hit with Valor. Can only happen once every 3s.
Reduce your active Cooldowns by 32% after getting an Elimination.
Hitting an enemy with Heirloom Rifle increases your Heirloom Rifle damage against that enemy by 7% for 3s, stacking up to 5 times.