Would it be correct to assume this or any other conversion action could withstand the same force that the original cartridge generated, even though the new cartridges' working pressure may be greater? Force = pressure x area, and the base of a 12 ga. shell at say 10,000psi is much larger than the area of the base of the .50-90, so I'm asking if the ratio of the areas would be a means of calculating a safe working pressure in the conversion. I'm sure there are probably other factors to consider, and I also wondered about the need for smaller bushed firing pins. Excess headspace will also allow the unsupported primer to back out and flatten.
