For what it's worth, I ran the load below at the range:
303Brit/P14 loaded by weight 05/28/13
174SMK/ VARGET*/ 40.0gr /CCI-200/PPU_Case**(1st)/OAL3.075"
PressQL=39,310psi/2,411fps(25.5"barrel)
*default burn rate was 0.6150/sec
**56.5grH2O/ 90.6%Vol/95.6%burn
ACTUAL velocity 12ft in front of muzzle (Oehler): 2,327fps (90°F)
PROBABLE PRESSURE (using cube of velocity ratio): 35,343psi
Adjusting the QL burn rate to O.5692 and temperature to 90°F to match the data, my objective of
~ 2,415fps (@70°F),
QuickLoad tells me to use/expect:
4
2.0gr VARGET (this lot#)
39,206 psi
This is pretty much what Hodgdon's web reference lists as max for that bullet, OAL, and powder -- and way more than Sierra.
Note, however, that this load generates less velocity in this rifle (even w/ a longer barrel than Hodgdon's test setup),
which would indicate less pressure for that load.
...which is why multiple references, something like QuickLoad, AND a chronograph are important in this day & age.