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Provided is a cartridge for a muzzle loading firearm. The cartridge includes a cylindrical sleeve portion defining an interior passage and a forward end comprising a tapered portion. A propellant charge is disposed within the interior passage, and an end cap defines a recess into which the tapered p

Provided is a cartridge for a muzzle loading firearm. The cartridge includes a cylindrical sleeve portion defining an interior passage and a forward end comprising a tapered portion. A propellant charge is disposed within the interior passage, and an end cap defines a recess into which the tapered portion extends while the end cap is installed on the tapered portion. The end cap comprises a first fastener portion that cooperates with a second, compatible fastener portion provided to a bullet. The second fastener portion is disposed adjacent to a rearward end of the bullet to establish a friction fit between the bullet and the end cap that maintains a position of the bullet on the cartridge to be loaded into the muzzle loading firearm.

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1. A cartridge for a muzzle loading firearm, the cartridge comprising: a cylindrical sleeve portion formed from a non-combustible material that defines an interior passage, the sleeve portion comprising a forward end relative to a firing direction comprising a tapered portion that defines an apertur

1. A cartridge for a muzzle loading firearm, the cartridge comprising: a cylindrical sleeve portion formed from a non-combustible material that defines an interior passage, the sleeve portion comprising a forward end relative to a firing direction comprising a tapered portion that defines an aperture with a cross-sectional area that is less than a cross-sectional area of the interior passage, and a rearward end portion that is arranged adjacent to an opposite end of the cylindrical sleeve portion and is separated from the forward end by the interior passage, wherein the sleeve portion is devoid of a retention feature that cooperates with a portion of the muzzle loading firearm that interferes with expulsion of the sleeve portion through a muzzle of the muzzle loading firearm so the sleeve portion is expelled from the muzzle in response to a discharge of the cartridge;a propellant charge disposed within the interior passage;a membrane provided to the rearward end portion to be positioned adjacent to a closed rear of a barrel and substantially enclose the propellant charge disposed within the interior passage;an end cap comprising a peripheral wall that defines a recess into which the tapered portion extends with the end cap installed over the tapered portion, wherein the end cap comprises a first fastener portion; anda bullet comprising a second fastener portion that is compatible with the first fastener portion of the end cap, the second fastener portion being disposed adjacent to a rearward end of the bullet to establish a friction fit between the bullet and the end cap that maintains a position of the bullet on the cartridge to be loaded into the muzzle loading firearm. 2. The cartridge of claim 1 wherein the membrane is solid, and is to be pierced to allow an ignition source to ignite the propellant charge within the sleeve portion. 3. The cartridge of claim 1, wherein the recess in the end cap comprises an axial length that is approximately equal to an axial length of the tapered portion. 4. The cartridge of claim 1, wherein the first fastener portion comprises an aperture formed in a central region of an end wall of the end cap, and the second fastener portion comprises a protruding member that extends from the rearward end of the bullet and is insertable into the aperture formed in the central region of the end wall to establish the friction fit. 5. The cartridge of claim 4, wherein the protruding member comprises dimensions that are equal to dimensions of another protruding member provided to another bullet of a caliber that is different than a caliber of the bullet. 6. The cartridge of claim 1 further comprising a sabot disposed between the sleeve portion and the bullet. 7. The cartridge of claim 1, wherein the sleeve portion is formed from a metal or a metal alloy. 8. The cartridge of claim 1, wherein the sleeve portion is formed from a plastic material.