View Single Post
Old May 29, 2013, 06:31 PM   #22
mehavey
Senior Member
 
Join Date: June 17, 2010
Location: Virginia
Posts: 6,869
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:
42.0gr 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.
mehavey is offline  
 
Page generated in 0.03699 seconds with 8 queries