Because the exit hole diameter of the cartridge restricts the gas flow. There is going to be a point where the only way to get more gas into the barrel, while the bullet is there, is to raise the pressure or lengthen the barrel. It will take some pressure curves from both cartridges to give an accurate answer. Do you know if that data is available for public viewing?Edd ,,, years ago they said that 257 WBY was way too overbore ,,, why is now the Lazz 257 Scramjet way too over bore ?
What is the case capacity of a 257 Scramjet?
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