Rick Barker wrote:
You cannot interchange them. The CCI's are hotter and can cause pressure increases. Example: According to Hodgdon loading manual, using Clays powder, WW AA hull and WW wad, 1-1/8 oz of shot to produce a 1200 fps shell.
Using a W209 and 18.2 grains of powder, your PSI would be 9800 lbs
Using a CCI and 18.1 grains of powder, your PSI would be 11,300 lbs.
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Rick,
This is NOT correct! You did not copy the data correctly from the Hodgdon manual.
Using the W209 primer, the pressure is 9800 LUP
Using the CCI primer, the pressure is 11300 PSI
LUP is NOT the same as PSI. There is no direct correlation between LUP and PSI.
Easystreet