Jent, Mark, et al:
While I am not denying that base wads from Federal 10-bore cases could come loose, I am a bit baffled as to how they could migrate halfway down the barrel. Please understand that I am NOT a physicist nor an explosives engineer, but these questions persist in my mind:
1) When gunpowder ignites it creates a gas pressure that is equal in all directions. This is physics.
2) As the wad column and shot move forward, it allows the building gas pressure to move this ejecta down the barrel and out the muzzle.
3) As the ejecta travels within the barrel, there is STILL gas pressure pushing backward against the base wad/cartridge head. When the shot and wads leave the muzzle, this pressure drops to zero.
4) In this whole process, I cannot think of any force induced by firing the cartridge that would allow the basewad to move FORWARD and down the barrel.
In posing these thoughts, I'm just trying to understand why this phenomenon apparently happens. NOT that it doesn't happen. I know that Tom Armbrust posts here occasionally, so he may have an expert's explanation as to why this apparent redefinition of physics takes place. Or point out what force moves the base wad forward.
Best. Kensal
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