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.

Stacking

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, total bullet lifesteal is given by:

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

For example, with 10% Bullet Lifesteal from Crippling Headshot and 35% Bullet Lifesteal from Leech, total bullet lifesteal is:

$BL_{Total}=1-(1-0.10)\times (1-0.35)\approx 41\%$

Sources of bullet lifesteal

Item	Cost	+X% Bullet Lifesteal
Active Reload	1250	+20%
Heroic Aura	3000	+20%
Crippling Headshot	6200	+10%
Bullet Lifesteal	1250	+28%
Leech	6200	+35%

In addition to the generic bullet lifesteal items listed above, Vampiric Burst provides +100% Bullet Lifesteal while its active ability is in effect.