I absolutely love how a bullet that exit a body is now tumbling and deformed by the impact... IF it had impacted a bone, a weapon or anything! GREAT attention to detail, man!
They also seem to model the loss of velocity based on what it passed through. When trying to line up multiple guys in one shot down a street, it seems best to avoid hitting the first guy in the helmet. Even passing though 2 bodies creates a lot of drop.
Notice the drop, the unluckly Germans not that far apart: