The standard projectile is a specially designed AP-I ( Armour Piercing-Incendiary ) grenade with pre-engraved rifling.
12.
The main gun's lethality was improved with the introduction of a new armour piercing fin stabilized discarding sabot ( APFSDS ).
13.
However, base fuzes have been used with armour piercing shells and for squash head ( HESH or HEP ) anti-tank shells.
14.
The warhead itself was a 500 kg hollow charge ( semi-armour piercing ( SAP ) warhead typical of anti-ship missiles.
15.
Beryllium copper has been used for armour piercing bullets, though such usage is unusual because bullets made from steel alloys are much less expensive and have similar properties.
16.
Gorman's gunner had time to fire one round before impact, but the shell was an explosive one, not armour piercing, and had little effect.
17.
As the submarines fired armour piercing shells, intended for use against steel ship hulls, the relatively softer brick walls may have failed to trigger the impact fuses.
18.
They probably did not have armour piercing rounds, but rather fragmentation'flak'rounds, and it is questionable how effective these would have been against armour.
19.
According to Nammo, a Finnish-Norwegian ammunition producer, the 5.56?5mm NATO M995 armour piercing cartridge can penetrate up to of RHA steel at 100 meters.
20.
In the 21st century the Russian military developed the semi-armour piercing 9SN cartridge for the 9.3 x 64 Brenneke SVDK variant of the Dragunov sniper rifle.
