SB, I think the hot gases ignite the powder in the adjoining cylinder as heat and fire are drawn to ignitable materials. A perfectly round unshaven ball will enable a impenetrable seal that will not require filling in the empty space of the chamber in order to prevent a chain fire.
Most Italian reproductions have a sharp edge at the entrance of the chamber that cuts into the ball leaving it misshapen. A chamfered cylinder has a tapered outer edge that allows the ball to be pressed in retaining more (preferably all) of its roundness, therefore eliminating the possibility of a chain fire in the front of the cylinder......which is what I would like to achieve.
I have never read or heard of any accounts of the practice of filling in the empty portion of the chambers in the civil war or the Old West, but an ounce of prevention is worth a pound of cure.
Most Italian reproductions have a sharp edge at the entrance of the chamber that cuts into the ball leaving it misshapen. A chamfered cylinder has a tapered outer edge that allows the ball to be pressed in retaining more (preferably all) of its roundness, therefore eliminating the possibility of a chain fire in the front of the cylinder......which is what I would like to achieve.
I have never read or heard of any accounts of the practice of filling in the empty portion of the chambers in the civil war or the Old West, but an ounce of prevention is worth a pound of cure.
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