Borderlands – How does Bore work

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Bore is a skill that lets your bullets pierce through enemies dealing bonus damage to subsequent enemies hit. It's description says

Each additional target takes +100% bullet damage

Does this mean the +100% is cumulative (+100% for the second target, +200% to the third target, etc) or is it just a flat double damage after the first? For that matter, is there a limit to how many targets a shot can pierce?

It also mentions this does not affect rockets and other special types of projectiles. What projectiles does it not affect?

Best Answer

The bonus from piercing is cumulative. Presumably there is some upper limit to the bonus, but I don't know what it is.