25mm Auto-Cannon Ammunition

25 mm caliber
The 25x137 mm caliber/.98425 inch is one of the standard sizes of cannon and auto cannon ammunition for NATO forces. The round itself has a length of approximately 223 mm (8.6 inches).

Usage
The 25 mm round can be used in both an anti-materiel and anti-personnel fashion. When operating in an infantry mode, a 25 mm weapon armed with HE rounds can effectively kill large numbers of opposing troops either in the open or in light fortifications. When operating in an anti-materiel mode, a 25 mm weapon armed with AP rounds can disable many aircraft and vehicles, including some main battle tanks.

The US military uses 25 mm weapons in their AV-8B Harrier, AC-130 gunship, M2 Bradley, LAV-25, F-35 Lightning II and as a standard ship-based munition in the Mk 38 autocannon.

Types of 25 mm ammunition
Several sub-types of 25 mm ammunition are available — the most common being Armor Piercing, High explosive, sabot, tracer, and practice rounds. Cartridges are usually composed of a combination of the aforementioned
categories. For example, the M791 pictured to the right is an Armor-Piercing Discarding Sabot with Tracer round. It is used against lightly armored vehicles, self-propelled artillery, and aerial targets such as helicopters and slow-moving, fixed-wing aircraft.


M791 25x137 mm round 25 mm caliber weapons
M242 Bushmaster
GAU-12 Equalizer
GIATs, M811
Oerlikons, KBA