Abstract: A breech plug for a black powder firearm is provided which breech plug has a chamber into which black powder, a black powder equivalent, or Pyrodex pellets is received and a flash channel for transmitting a flame to the chamber. The flash channel includes a linear portion which is at an angle of more than 0 degrees and less than 90 degrees with respect to a bottom wall of the chamber. In a preferred embodiment, the linear portion of the flash channel intersects the center of the bottom wall of the black powder chamber. The breech plug further has a threaded bore for receiving a nipple over which a percussion cap to be struck by a trigger actuated hammer is placed. The flash channel also includes a curved portion which extends between the bore and the linear portion.