I use four different "damage classes"
Little Damage = LD = 1/10 hp. I use it for small games like bunnies and burrows and other really small characters
Damage Capacity = DC = 1 hp. Used as normal.
Vehicular Damage Capacity = VDC = 10 hp. Used for Vehicles
Mega Damage Capacity = MDC = 100 hp. Used for big vehicles and heavily armored vehicles
Ultra Damage Capacity = UDC = 1,000 MDC!!. I use it for big spaceships (Star Trek, Star Wars, ROBOTECH, etc.).
A weapons class can only affect one class above...
Thus LD can harm DC, DC can harm VDC, but not MDC, VDC can damage MDC, but not UDC and MDC can harm UDC...but I rarely bother even annotating it.
-STS