US Cartridge, 75mm Blank, M337, M337A1, M337A2
This blank cartridge is provided for saluting purposes and simulated firing.
The complete round consists of cartridge case M9A1 containing percussion primer M1B1A2 and a 1 pound charge of granular potassium nitrate black powder in a cotton cloth bag. The bag is fabricated in the shape of a hollow cylinder to allow assembly over the primer. The cartridge case is sealed by a closing cup which is cemented over the black powder charge.
The M337A1 cartridge is similar to the M337 except that sodium nitrate black powder is used as the charge.
Nothing else to see.