Without reference to any particular caliber, you will have higher readings with PE, than with crusher, because they are measuring different things. You cannot compare old "CUP" data to more modern "PE" data and make any assumptions about increasing or decreasing the powder charges.In other words, you will be asking for trouble if you exceed the accepted "crusher" derived maximum numbers in order to come up to the maximum accepted "PE" derived numbers.I used the term "numbers" instead of "pressure", on purpose,in an attempt(maybe misguided)to avoid confusion.
Mike
