25 mm caliber
Videos
25 mm caliber is a range of autocannon ammunition. It includes the NATO standardized Swiss 25×137mm, the Swiss 25×184mm, the Soviet 25x218mmSR, and the Chinese 25×183mmB.
25×137mm M793 target practice with tracer (TP-T) rounds for the MK-38 being inspected
Japanese 25×163mm ammunition from a post-war US technical manual
30 mm caliber
Videos
The 30 mm caliber is a range of autocannon ammunition. It includes the NATO standardized Swiss 30×173mm, the Soviet 30×155mmB, 30×165mm and 30×210mmB, the Czechoslovak 30×210mm, the Yugoslav 30×192mm,
25 mm caliber
…25 mm grenade 30 mm caliber List of cartridges (weaponry), pistol and rifle…
Size comparison between 30×170mm (left), a One Pound Coin (middle) and 5.56x45mm NATO (right)
Soviet 30×165mm
The DU penetrator of a 30×173 mm round used in the GAU-8
French 30×150mmB