A breech plug for a muzzle loading firearm is attachable to a barrel having a muzzle end and a breech end. A breech element having a breech face is connected to the breech end of the barrel. The breech element moves between an open position in which the breech face is away from the breech end of the barrel, and a closed position in which the breech face abuts the breech end of the barrel. A breech plug body is removably attachable to the breech end of the barrel. The breech plug body has a rear face that abuts the breech face when the breech element is closed, so that a primer contained in a primer pocket in the rear face of the breech plug body is fully supported on all sides.
1. A breech plug for a muzzle loading firearm having a barrel, the barrel having a muzzle end and a breech end, a breech element connected to the barrel, the breech element having a breech face, the breech element being movable between an open position in which the breech face is away from the breech end of the barrel, and a closed position in which the breech face is in registration with the breech end of the barrel, the breech plug adapted to receive a primer and comprising:
a breech plug body removably attachable to the breech end of the barrel, the breech plug body defining a primer pocket that is enclosed when the breech element is in the closed position such that the primer, when positioned within the primer pocket, is fully supported on all sides; and
wherein the primer pocket is at least in part defined by an extractor movably connected to the breech plug body.
2. A breech plug for a muzzle loading firearm having a barrel with a muzzle end and a breech end, the breech end of the barrel defining a breech plug chamber, the breech plug chamber having a track portion that defines a path, the breech plug comprising:
a breech plug body removably attachable to the breech end of the barrel within the breech plug chamber, the breech plug body including a flange portion having a periphery;
a pin that protrudes radially from the periphery; and
wherein the pin is received by the path defined by the breech plug chamber for limiting an orientation in which the breech plug body may be installed within the breech plug chamber.
3. A breech plug for a muzzle loading firearm having a barrel with a muzzle end and a breech end, a breech element connected to the barrel and having a breech face movable between an open position in which the breech face is away from the breech end of the barrel and a closed position in which the breech face abuts the breech end of the barrel, the breech plug comprising:
a breech plug body removably attachable to the breech end of the barrel, the breech plug body defining a primer pocket and having a rear face abutting the breech face when the breech element is in the closed position; and
wherein the primer pocket is at least in part defined by an extractor movably connected to the breech plug.
4. A breech plug for a muzzle loading firearm having a barrel with a muzzle end and a breech end, a breech element connected to the barrel, the breech element having a breech face, the breech element being movable between an open position in which the breech face is away from the breech end of the barrel, and a closed position in which the breech face abuts the breech end of the barrel, the breech end of the barrel defining a breech plug chamber, the breech plug chamber having a track portion that provides a path, the breech plug comprising:
a breech plug body removably attachable to the breech end of the barrel, the breech plug body defining a primer pocket and having a rear face abutting the breech face when the breech element is in the closed position;
the breech plug body having a flange portion, the flange portion having a periphery;
a pin that protrudes radially from the periphery of the flange portion; and
wherein the pin is received by the path defined by the breech plug chamber for limiting an orientation in which the breech plug body may be installed within the breech plug chamber.
5. A breech plug for a muzzle loading firearm having a barrel with a bore defining a bore axis, the barrel having a muzzle end and a breech end, a breech element connected to the barrel, the breech element having a breech face and being movable between an open position in which the breech face is away from the breech end of the barrel, and a closed position in which the breech face abuts the breech end of the barrel, the breech plug comprising:
a breech plug body removably attachable to the breech end of the barrel;
the breech plug body defining a primer pocket and having a rear face abutting the breech face when the breech element is in the closed position, the rear face of the breech plug body entirely encircling the primer pocket;
a movable extractor forming part of the rear face of the breech plug body; and
a slot formed in the rear face of the breech plug body that extends perpendicular to the bore axis from the primer pocket.
6. The breech plug of claim 5 , wherein the slot is configured so as to receive a leg portion of the extractor only when the breech plug body is in a selected orientation and to prevent rotation of the breech plug body when in said orientation.