But its bullet resistance
is not much better than that of a patrol car, the lieutenant said.
Unlike bullet resistance
, blast resistance must deal with two phases of positive and negative pressure waves that are created radiating outward and then inward.
The standard would also establish voluntary tests and classification ratings for seven other categories, including: operating force, mechanical strength, ventilation, bullet resistance
, explosion resistance, mechanical durability and burglar resistance.
says Kings, "is that the various police agencies aren't keen on us adding bullet resistance
to everyday cars.
As an added benefit (particularly in the Magnums) the added bullet resistance
to moving helps the slow burning powders develop pressure to give the magnum velocities.