FredC wrote on Oct 29^th, 2015 at 12:29pm:

. . . The pressure curve you posted is in PSI not CUP. Would 51K PSI correspond with Hodgdon's  42.8K CUP? . . .

As can be seen in the chart posted below, there is no accurate way to correlate piezo-transducer (psi) and copper-crusher (CUP) pressures. There are just too many variables affecting results in different cartridges.

What I can tell you is that QuickLOAD pressure figures are calculated to correlate with CIP piezo standards, which give these "Pmax" ("MAP" in US terms) figures -

.30-40: 47137 psi
.358W: 58740 psi
.35 W: 44236 psi

If you want to use QuickLOAD to estimate loads for your .35 Krag, measure the difference in weight between an empty case and the same one filled to overflowing with water. That will yield a maximum volume from which QL will calculate usable volume for any given bullet and seating depth. Results will still be guesswork, but a bit more "educated".

Table from a 1987 Hercules data brochure, using SAAMI MAP figures -

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