Harold, I just had tested a very similar load BUT paper hull.
Cheditte 2 1/2,
Ched primer,
14.5 of 20/28,
7/8 #8,
Sporting 20 wad.
Came in at 1216 FPS and 10,395 PSI. I'm trying to get to 1200/8500 in paper for my 20s. Interesting, same load in plastic is significantly lower PSI. I gotta do some careful hull examination, not sure where but there must be serious volume difference plastic vs. paper, both Cheditte.
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