Quote:
Originally Posted by OKFC05
OK you didn't under stand the long answers, so here is the short one:
The pressure testing equipment, either test barrels or strain gauges on real guns, measures the CHAMBER PRESSURES OF THE STEEL CHAMBER, but it's OK to call that the internal cartridge pressure because THEY ARE THE SAME.
The PEAK PRESSURE comes just as the bullet starts to move and DROPS as the bullet goes down the barrel, so PEAK pressure does not change with barrel length. The PEAK PRESSURE is what is published in the loading manuals as "Pressure."
For a revolver, the PEAK Pressure comes before the bullet exits the cylinder.
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Thank you for the short answer, very well thought out.
I guess my answer in post #7 seven "internal cartridge pressure" is too direct for most people.
The op asked:
"Are the published pressures in reloading manuals?"
A. the internal cartridge pressure
B. the max barrel pressure
C. or are both the same thing
A. Is the correct answer
b. Max bbl pressure has nothing to do with what is published in the reloading manuals.
c. Both are not the same thing. Not hardly by your own answer "For a revolver, the PEAK Pressure comes before the bullet exits the cylinder"
The PEAK pressure as you put it is no where near the bbl!!! Therefore when the op asked about published pressures in reloading manuals being the max bbl pressure.
The answer is NO!!! It's always the internal cartridge pressure.
A cylinder is not a barrel and cylinder pressure has nothing to do with the "max bbl pressure" from a load/cartridge shot in a revolver.
And yes for those of you that don't know even though a revolver uses a cylinder (that's where the PEAK cartridge pressure takes place),there is still a max bbl pressure in the bbl of the revolver. And that MAX pressure in that revolvers bbl is no where near the PEAK pressure in the cylinders.