
The projectile, most typically a solid lead ball, loose shot, a Minié ball or a jacketed modern bullet in a plastic sabot. On most naval cannons, the wadding at the end of the barrel not only served the purpose of creating a better seal around the shot, but to also act as a plug, to stop the shot rolling out due to the swaying of the ship.
BLACK POWDER MUZZLE LOADER PATCH
In Minié rifles, no patch is used as the projectile has a base which expands to grip the rifling. In rifles firing round ball, a lubricated patch of fabric is wrapped around the base of the ball which grips the rifling and imparts spin to the ball. In shotguns, this is placed in when the ball becomes difficult to press into the barrel (in small arms). The gunpowder used is typically black powder or blackpowder substitutes like Pyrodex. Gunpowder, by pouring in loose powder, inserting a pre-measured bag or paper packet of gunpowder (called a cartridge) or by inserting (the less desirable) solid propellant pellets. It usually, but not always, involves the use of a loose propellant (i.e., gun powder) and projectile, as well as a separate method of ignition or priming. Muzzleloading can apply to anything from cannons to pistols but in modern parlance the term most commonly applies to black powdersmall arms similar in the main to the weapons used. Mortars are muzzle loaded and are a type of short-range artillery. Modern muzzleloading firearms range from reproductions of sidelock, flintlock and percussion long guns, to in-line rifles that use modern inventions such as a closed breech, sealed primer and fast rifling to allow for considerable accuracy at long ranges. The firing methods, paraphernalia and mechanism further divide both categories as do caliber (From cannons to tiny caliber palm guns).

The term of art is not meant to connote anything about whether the weapon's barrel had received the further machining step of rifling the barrel, so there are two broad classifications: rifled muzzleloaders and smooth bore muzzleloaders. The term "muzzleloader" may also apply to the marksman who specializes in the shooting of ML Firearms. This is distinct from the more popular modern (higher tech and harder to make) designs of breech-loading firearms. A muzzleloader is any firearm into which the projectile and usually the propellant charge is loaded from the muzzle of the gun (i.e., from the forward, open end of the gun's barrel).
