Hitscan (Physical Bullets Disabled) Penetrations and Richochet can deal extra damage against players and "ignore" bullet range.

[BurgerLUA]

Shooting an enemy in the arm can cause it to also deal damage to the torso if the torso is behind the arm you shot. This may be intended behavior, but what also occurs is that the range calculations basically set the starting distance to where the penetration starts (in this case, the arm) and not player's view origin. This can cause shotguns to deal massive damage at long ranges when they're not supposed to because the bullet calculations think that the bullet started at the arm.

[BurgerLUA]

This seems to be fixed on the github version.