Bruce, the thread started out about what causes pressure in a shotgun shell and went to perceived recoil. Perhaps I misunderstood Pete's claim about friction in a barrel being a factor in pressure. I could believe hard shot doesn't compress as easily as lead when going through a forcing cone so higher pressures would be a result. I don't believe going down the barrel has anything to do with higher pressures. When writing instead of talking to someone face to face, sometimes it's hard to explain/understand exactly what is meant. I started the thread mainly to bring to every ones attention how important the crimp is and how it changes pressure.
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Paul Harm
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