Armor Penetration Model?

[MarkSheppard]

A gun with the same stats, but with greater WH will have more "carry" for the larger round.

That makes quite a lot of sense; seeing as a bigger bullet will lose energy less over a distance versus a smaller, but faster round; you can see this in real live in the .45 ACP and the 9mm Parabellum debate.

(WH size also factors in the kill routine, once a penetration has occured)

Thanks for confirming my suspicions on this.