
The Mk II High Explosive Shell is standard for issue and manufacture although it is not widely used for infantry support. It is only reasonably satisfactory as a substitute for armor piercing shot against lightly armored targets since it will not penetrate .375 inch of good armor plate at 500 yards.
No information about hazardous components.
Nothing else to see.
TM 9-1904, Ammunition Inspection Guide (1944)