Perhaps you are tired of them 'other guys', belittling your breech plug, because it is not reliable igniting BH209. If so, here is the solution. When you finish, your QRBP, will be a better plug than any them 'other guys' have.

The first step is to enlarge the flame channel. Sabotloader explains, and shows how to do it, in this thread about the TC speed breech plug.

When finished with this step, the breech plug will look like the QRBP on the left. The OEM plug is on the right.








Once the channel is drilled stem to stern with the #21 drill, one then creates a chamber on the barrel end of the plug. sabotloader doesn't show this step. I believe it is because he likes to use 777. To create the powder chamber, one tips the plug over as shown in sabotloader' thread, and in progressive steps, with progressively larger drills, the chamber is created, much the same way he enlarged the flame channel. This chamber can be made to have a diameter of 5/16", or 3/8"; either will provide 100% reliable ignition of BH. Myself, i like to make this chamber approximately square i.e. as deep as it is wide.








QRBP with different diameter chamber pictured, along with vent liners.



Once this chamber is created, one can finish off the bottom with the 82 degree spot drill, as sabotloader did, or one can use a 82 degree counter sink, or center drill. Then following sabotloader' technique one taps the flame channel at the bottom of the chamber to receive a vent liner. Myself, i find that taps made in Bosnia are the cat's meow; they cut so much easier than the USA made carbon steel taps. These vent liner can be purchased from various places, or one can make them. The head of these vent liner, are near 3/8" diameter, so if one has a 5/16" diameter chamber, the vent liner needs to be turned down; this suggests one should make a 3/8" diameter chamber to eliminate this need. These purchased vent liner often have a 0.032" flash hole. I have made them with 0.028", 0.029", and 0.31" flash hole, and they all work. Flash hole size doesn't seem to be critical.

This QRBP will be 100% reliable igniting BH. It can use any regular shot gun primer; magnum primers are not required. It can be argued this is the ultimate breech plug. It makes a perfect seal with the barrel. It requires no anti-seize grease. It requires no teflon tape. It requires no tools to install or remove. There are no parts or pieces on it that will wear out, and need replacing.