Looking at a psi chart I copied off of a Doublegunshop topic, the highest pressure load that was tested had about 9800 psi one inch from the standing breech; the lowest 8700. These, I believe were three nitro and one black. At nine inches all loads were under 3900 psi.
Interesting the the lowest chamber load retained the highest psi down the barrel; probably a slower powder.


Last edited by Patriot USA; 01/11/11 02:12 PM.
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