
This cartridge is designed for training in gunnery and fire control with 152mm gun launchers.
The M411 cartridge has an M557 PD fuze and a supplementary charge for spotting purposes in the aluminum spike; otherwise, the projectile is hollow. A tracer is in the base of the projectile for observation of the trajectory The hollow projectile is secured to a cartridge case of combustible material. The case is filled with bagged propellant and equipped with an electrical ignition element.
Electric current from the firing mechanism initiates the ignition element/primer and the resulting flash ignites the propellant. The burning propellant generates gases which force the projectile from the gun tube and concurrently ignite the tracer. This cartridge has a functioning fuze and spotting charge.
Filler - TNT (0.3 lb, 0.14 kg)
Cartridge case - XM157
Propelling charge - M189
Primer - M91
Tracer - M13
Length, overall - 26.7 in, 678.2 mm