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This disclosure relates generally to cartridges for use in projectile-launching devices, such as ammunition cartridges, flare cartridges, and the like, including components of the cartridges, and methods for their manufacture. For example, the cartridges of this disclosure can be ammunition cartridg

This disclosure relates generally to cartridges for use in projectile-launching devices, such as ammunition cartridges, flare cartridges, and the like, including components of the cartridges, and methods for their manufacture. For example, the cartridges of this disclosure can be ammunition cartridges such as shotshell cartridges, which include an obturating medium which functions to seal the compressed but expanding hot gases and can be used without a pre -formed gas seal.

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1. A cartridge comprising: a) a cartridge case having a proximal end and a distal end and, comprising a primer situated at the proximal end;b) a propellant, a portion of which is contiguous with the primer;c) a granulated obturating medium, a portion of which is contiguous with the propellant; andd)

1. A cartridge comprising: a) a cartridge case having a proximal end and a distal end and, comprising a primer situated at the proximal end;b) a propellant, a portion of which is contiguous with the primer;c) a granulated obturating medium, a portion of which is contiguous with the propellant; andd) at least one projectile, a portion of which is contiguous with the obturating medium;wherein the cartridge does not contain a pre-shaped gas seal. 2. A cartridge according to claim 1, wherein the distal end of the cartridge is crimped closed or partially crimped about the at least one projectile. 3. A cartridge according to claim 1, wherein a granulated obturating medium is mixed with the at least one projectile. 4. A cartridge according to claim 1, wherein the at least one projectile is insertably disposed over the obturating medium, and is compressed against a granulated obturating medium. 5. A cartridge according to claim 1, further comprising a polymer skirt extending about the at least one projectile, wherein the polymer skirt optionally comprises slits disposed along its body. 6. A cartridge according to claim 1, wherein a granulated obturating medium comprises a thermoplastic, a thermoset, an elastomer, a thermoplastic elastomer, or any combination thereof. 7. A cartridge according to claim 1, wherein a granulated obturating medium is selected from a polyethylene, a polypropylene, an ethylene alpha-olefin copolymer, a propylene alpha-olefin copolymer, an ethylene vinyl acetate copolymer, or any combination thereof. 8. A cartridge according to claim 1, wherein a granulated obturating medium comprises a polyethylene, a polypropylene, or a combination thereof. 9. A cartridge according to claim 1, wherein a granulated obturating medium further comprises a flow control additive. 10. A cartridge according to claim 1, wherein the cartridge is an ammunition cartridge, a flare cartridge; a grenade launcher cartridge, a smoke flare cartridge, a signaling device cartridge, a chemical munitions cartridge; a distraction device cartridge, or a pyrotechnic launching device cartridge. 11. A cartridge according to claim 1, wherein the at least one projectile is a frangible projectile, a rubber projectile, a bean bag projectile, a tear gas-containing projectile, an oleoresin capsicum-containing projectile, a liquid-filled marking projectile, a tracer projectile, a penetrator projectile, a flechette projectile, an armor-piercing projectile, an incendiary projectile, a flare projectile, a chemical particulate-containing projectile, or any combination thereof. 12. A cartridge according to claim 1, wherein the cartridge is an ammunition cartridge and the at least one projectile is lead-containing, lead-free, or a combination thereof. 13. A cartridge according to claim 1, wherein the cartridge is an ammunition cartridge and the at least one projectile comprises steel, bismuth, tungsten, tin, iron, copper, zinc, aluminum, nickel, chromium, molybdenum, cobalt, manganese, antimony, alloys thereof, composites thereof, or any combinations thereof. 14. A cartridge according to claim 1, wherein the cartridge is a shotshell cartridge and the at least one projectile is selected from birdshot, buckshot, and slug projectiles. 15. A cartridge comprising: a) a cartridge case having a proximal end and a distal end and comprising a primer situated at the proximal end;b) a propellant, a portion of which is contiguous with the primer;c) a granulated obturating medium selected from polyethylene, polypropylene, or a combination thereof, a portion of which is contiguous with the propellant;d) optionally, a flow control additive combined with the obturating medium; andd) at least one projectile, a portion of which is contiguous with the obturating medium;wherein the cartridge does not contain a pre-shaped gas seal, and the distal end of the cartridge is crimped closed or partially crimped about the at least one projectile. 16. A cartridge according to claim 15, wherein the cartridge is a shotshell cartridge and the at least one projectile is selected from birdshot, buckshot, and slug projectiles. 17. A cartridge according to claim 15, wherein the cartridge is a shotshell cartridge and the at least one projectile comprises lead, steel, bismuth, tungsten, tin, iron, copper, zinc, aluminum, nickel, chromium, molybdenum, cobalt, manganese, antimony, alloys thereof, composites thereof, or any combinations thereof. 18. A shotshell comprising: a) a shotshell case having a proximal end and a distal end and comprising a primer situated at the proximal end;b) a propellant, a portion of which is contiguous with the primer;c) a granulated obturating medium, a portion of which is contiguous with the propellant;d) optionally, a flow control additive combined with the obturating medium; ande) at least one projectile selected from birdshot, buckshot, and slug projectiles, a portion of which is contiguous with the obturating medium;wherein the shotshell does not contain a pre-shaped gas seal. 19. A shotshell according to claim 18, wherein a granulated obturating medium comprises a polyethylene, a polypropylene, or a combination thereof. 20. A cartridge comprising: a) a cartridge case having a proximal end and a distal end and, comprising a primer situated at the proximal end;b) a propellant, a portion of which is contiguous with the primer; andc) a particulate projectile material having obturating properties, a portion of which is contiguous with the propellant;wherein the cartridge does not contain a pre-shaped gas seal.