HalfaDouble,
I didn't read Dell's report, did he provide pressure curves, or did he measure pressures? Smokeless powder is not an explosive, it is a flammable solid. It must burn enough to create enough gas to build the pressure that increases the burn rate( speed). Granted, this occurs in a very short time, but it is very difficult to imagine a sudden "wall" of high pressure gas hitting the base of the bullet and moving sideways, while the rest of the vessel( cartridge case) is at a different pressure. I know my training is construction, not fluids, but it would be easier to understand if there were pressure measurements showing pressure exceeding the elastic limit of steel. BTW has anyone reported bulges at the location of the "rings" or is the steel compressed? Note: this is not a smart a$$ question, I'm interested.
Mike
