David
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Some further information on Pedersoli Gibbs breech plugs from Dick Trenk, their American Rep.: ==================================== The drawing above is NOT correct for the one we make. Our chamber has the 9mm x .75" drilling in the breach plug face, and it is flat bottomed not rounded much. The nipple sits on the right side above a large diameter flash chamber cast or machined down next to the 9mm chamber. Then a flash hole is drilled from the left side right through both sides of the chamber and into the flash chamber under the nipple. The left side of this hole is threaded and plugged. We do not recommend removing this plug for normal cleaning. The cap flash (brissance) goes down from the nipple, into the large flash chamber and turns left into the 9mm powder chamber. When charging the rifle, I suggest tipping it so the nipple is low and tap the barrel with the hand to jar some powder grains into the chamber "under" the nipple. This simple quick step has shown to increase ignition reliability as well as to lower the SD a bit. The 451 Gibbs likes Swiss 1.5 Fg but works well with FFg. The .40 Gibbs should use only FFg. We suggest CCI Magnum caps but also suggest you determine what your indivdual rifle may show a preference for. ==================================== David
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