Quote:
Originally Posted by Diesel Kilgore
7.5gr Unique/240-250 swc
One has it listed at 11,200 psi, the other at 13,000 cup.
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Handloader #236 list 429421 & Unique/6.9gr as a max. (15,500 PSI) standard pressure load. (Lyman lists it at 13.3K CUP)
It also lists 429421 & Unique/7.5gr as a "+P" in the second category. 951fps from 4-1/4" bbl or 989fps from a 7-1/2" bbl.
SAAMI spec are 15.5K PSI or 14K CUP max.
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