I ask for help with the following items.
Unknown firing device for Olin 863-1 cartridge.
Steel body and cap with electric contact on top.
The vent bolt inside must bleed the pressure through 2 small holes in the stem and out the base hole.
Body is 51mm diameter and 85mm long. 16 TPI threads.
The 4ga? cartridge was tight in the chamber so original with the device.
OLIN 863-1 headstamp, 26mm long if loaded.
Second cartridge is the same but earlier? 25.5mm loaded length. No headstamp.
Black print on case is hard to read:
WCC - 1 77 1969
Third cartridge is Mk2 Mod 1 CARTRIDGE IMPULSE. Fired case 32.5mm long.
How is this cartridge used?