Geo. I think you're right on that but even with a dram equivalent I can get some idea of where the pressure is or at least a range of pressure. But all it said on the box of Kent's Tungsten Matrix is 'MAX'. Anyone call Kent to see where their chamber pressure is? Granted I know dram equivalent is not the best way to do it but with that number and the weight of the shot charge I can at least back into a range of chamber pressures using a reloading manual...or can I??? confused