Some weapons are so powerful that they can punch right through armour, so armor provides less protection against them. Such weapons confer modifiers that are subtracted from the foe's armour saving throw. This is shown by the table below.
Strength of Hit | Reduces Armour Save By |
3 or less | None |
4 | -1 |
5 | -2 |
6 | -3 |
7 | -4 |
8 | -5 |
9 | -6 |
10 | -7 |
For example: A crossbow has a Strength of 4. A crossbowman hits a warrior in light armour with shield. Normally the warrior would need to roll 5 or 6 to make his save and avoid taking the wound but because of the crossbow's enormous hitting power 1 is subtracted from his dice roll. This means he must now roll 6 to save.