US Projectile, 3 inch HE, M1915
This round of ammunition is a base fuzed high explosive round used for armor piercing work.
The shell used in the M1915 HE Round is of forged steel construction. It has a rather blunt nose (radii of ogive of 2 calibers) and a square base. The filler is 1/2 pound of Explosive D. A steel base plate is assembled by means of lead calking wire. The shell has a rotating band of approximately 0.55 inch.
Nothing else to see.