I am bad at the game so I edit the wiki

Item Cost +X% Bullet Lifesteal
Active Reload Souls1250 +20%
Heroic Aura Souls3000 +20%
Crippling Headshot Souls6200 +10%
Bullet Lifesteal Souls1250 +28%
Leech Souls6200 +35%

Use this for the debug console when testing the ItemsByStat page: =p.tablefy( mw.getCurrentFrame():newChild{ title="Module:ItemsByStat", args={"BulletLifestealPercent", "+X% Bullet Lifesteal", "%"} } )