
Mods 1 and 2 of the 16 inch Target Projectile Mk 9 are physically the same. Different Mods distinguish products of different contractors. The Mk 9's have no spotting dye.
Mk 10 is exactly like the Mk 9, except that it contains a spotting load.
These target shells match the 16 inch AP Projectile Mk 8 in ballistic traits.
No information about functioning.
Nothing else to see.
OP 1664, Volume 1 - US Explosive Ordnance (1947)