non lethal 12gauge cartridge independent size firing pin gas delayed,nessler ball gyro effect system {drawing https://youtu.be/wb5Sf3Uzfhk }{ real gun ammo referance https://youtu.be/dD-RanLex2c } https://youtu.be/cfNpk5M_OYE
I had an interesting thought yesterday, it was about using a grill igniter attached to a lawn & garden sparkplug in a muzzle loader to not need priming caps anymore.
Then it hit me, could One use lab grown piezo crystals to replace primers and pres them in printed reenforced polymer shell casings & hulls.
Just food for thought.
https://makezine.com/2008/07/31/how-to-make-piezo-crystal/