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Here's Somebody's Worst Nightmare
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10-19-2010, 02:00 PM
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Big Friend Ten (BFT)
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Lengthing the chambers to 3.5" could cause the barrel at that point to be too thin to hold maximum pressure. This would be ever more likely if the gun originally had 2 & 5/8" chambers.
British Proof rules DO NOT allow even lengthing forcing cones!