US Cartridge, 165mm TP, M623
This cartridge is similar in appearance to Cartridge HEP M123A1 and is used for target practice with the M135 gun cannon.
Except for the projectile and fuze, the target practice cartridge is assembled with the same components as the HEP cartridge. The primary difference between the two rounds is that the TP projectile contains an inert filler in lieu of explosive, and is fitted with either a solid base plug or a dummy fuze assembled to the standard M123A1 base plug. The handle assembly attached to the base of the primer, is fitted with a quick-release mechanism which permits its removal after the round is loaded into the weapon.
Nothing else to see.
Collaborative Ordnance Data Repository