Dave, I am curious about that du Pont 3-1/2 dram bulk smokeless load with 1-1/4 ounce that develops 11,600 pounds, is that pressure shown as LUP? If you have the booklet handy, what is its date?
In comparison Askins reported in 1929 that du Pont's ballistic sheet showed 4.65, 4.70 and 4.76 tons/sq in for 3-1/2 drams of its bulk smokeless powder and with 1-1/4 ounce of No 2, 4 and 6-shot respectively. Lead crushers were in use at that time. Those loads were listed as MAXIMUM (all caps as per Askins).
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