Bullet Lifesteal

This article is about the stat. For the item, see Bullet Lifesteal (item).

Bullet Lifesteal is a stat that causes a percentage of bullet damage dealt to be regained as health.

Math

Despite being presented in-game as +X% Bullet Lifesteal, different sources of bullet lifesteal stack multiplicatively, not additively. With $n$ different sources of bullet lifesteal, final bullet lifesteal $BL_{F}$ is given by:

$BL_{F}=1-\prod _{i=1}^{n}(1-BL_{i})$

where $BL_{i}$ is the bullet lifesteal provided by the $i$th source.

Example

With 10% Bullet Lifesteal from Crippling Headshot and 35% Bullet Lifesteal from Leech, final bullet lifesteal is:

$BL_{F}=1-(1-0.10)\times (1-0.35)=41.5\%$

Note that the in-game user interface is inconsistent in how it rounds the final number.

Sources

List of items

Name	Cost	Category	Stat change
Active Reload	1,250	Weapon	+20% Bullet Lifesteal
Heroic Aura	3,000	Weapon	+20% Bullet Lifesteal
Crippling Headshot	6,200	Weapon	+10% Bullet Lifesteal
Vampiric Burst	6,200	Weapon	+100% Bullet Lifesteal
Bullet Lifesteal	1,250	Vitality	+28% Bullet Lifesteal
Leech	6,200	Vitality	+35% Bullet Lifesteal