I bought a box of them last year but cannot remember where I bought it from. They came in a 40 round cardboard box. The box says:
7,62mm CARTRIDGE BLANK
PPU 8003 Powder MBL 80107
These things are incredibly loud and make a great fireball. They're good for launching spent shotgun shells off the muzzle. I want more of them; where can I get them?
Thanks! That spurred my memory and is where I got them before.