Different units makes things confusing!  For example Olpeddler mentions the 40,000psi limit.  No, not 40,000psi, 40,000cup. According to one of the powder company's ballistic techs I was talking to one day, 40,000cup would roughly equate to 47,000psi.  In ADI's data for .303 British SAAMI MAX is 45000CUP/49000PSI  It's only confusing I guess, if one fails to note the different units.  That .303 data by the way gives CUP start charges with ADI powders for a variety of bullet weights that are below 40000CUP.  ADI's Krag data however doesn't give start charge pressure.  Capacity of the two cases is very close.  Many Hodgdon powders are ADI powders.
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