Description
It was found that when using the base and 6-in- crement charge for firing in the lower zones, a large amount of powder was wasted, therefore, two new charges for the M1917-17A1-18 Howitzers were developed. One is designated as the Ml Charge and consists of the base charge and four increments, or the first five zones. It has a maximum diameter of 6 inches, is about 6 inches in length, and weighs approximately 3.93 pounds. The Ml Charge is contained in cartridge bags dyed green, and is designated as a “Green Bag” charge to distinguish it as the one used for the first 5 zones of fire in the howitzer.
The M1 (green bag) Charge did not prove satisfactory because of its length. Since it was only as long (6 in.) as its diameter, it would topple over in the chamber of the weapon exposing the side instead of the igniter pad to the flash from the primer. The result was poor ignition and irregular burning of the propelling charge. To remedy this disadvantage, the M1 was modified to M1A1 by changing the length to 10 inches and the diameter to about 4.5 inches. The weight remains the same; decreased diameter compensates for increased length.
Functioning
No information about functioning.
See Also
Nothing else to see.
Source(s)
TM 9-1904, Ammunition Inspection Guide (1944)
