Comments by "Jack B" (@WindFireAllThatKindOfThing) on "Forgotten Weapons"
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Here's a bizarre idea, and just hear me out:
Go backwards in time for a caseless design. Instead of having fragile, formed rounds without a case, have a Propellant reservoir that automatically feeds single shot quanitities into the chamber after taking an entirely separated projectile with a stub of primer in it...think of an auto loading flint lock's powder horn, but rather automated and internalized to the action. Instead of a bolt, you get a revolver cylinder style trio of chambers spinning, like an unholy mutant love child of a Revolver and an M134 feed system.
The top chamber aligned with the bolt is the "live" loaded cylinder position after the charge mates with the projectile and primer (in the back of the bullet maybe?) from the belt/magazine/feed tube/whatever, and goes Boom down the barrel.
The "unlock/extract/eject" cycle happens when the cylinder spins down, then is "brushed" clean a quick acting plunger brush, which takes the place of an Ejection Port flip, etc.
The "sear/feed/chamber" cycle happens on the next 3rd of the spin of the bolt/cylinder, where automated measures of propellant are aligned with a bullet/primer, and then rotated up to the firing position at the top of the rotating bolt's position.
It's just a clock action, where the barrel fires at 12, the chamber (for lack of a better term) gets swabbed at 4, and the powder, primer, and projectile combine as a round at the 8 o'clock position. No reciprocation, just spin powered by short recoil or a damn Dremel motor if need be, and the whole thing stays sealed except for the muzzle, and no case is necessary.
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