Hi,
Yeah, the whole bronze plug thing. According to Cowan, the plug had to be bronze or it did not work right except that Ricky Roberts and Brian Brown have been proving for years that a steel plug works just fine. I don't think Cowan was aware that the 2nd surviving ordnance rifle in Milwaukee has a steel plug. There is a civilian Ferguson in the royal collection with a silver alloy plug and I am aware of another civilian Ferguson with some bronze alloy. However, I've also examined several other civilian Fergusons, all with steel plugs. So the whole plug thing is a red herring. Also many folks making the TRS parts sets don't realize the ordnance rifle is much daintier than you would guess from photos. Cowan's gun is a bit bulky in the butt compared with the original and I made the same mistake when I first built mine. Then I had the chance to handle the original in Morristown and realized my mistakes. I went back and trimmed down my copy. The photos I show above are of the slimmed down and correctly colored rifle consistent with the Morristown gun. Another thing to realize is that Cowan's and my versions are made better than the originals, which were hurried through production. The stock work on the originals was much cruder.
dave