I had limited access to supplies, and needed a non-tox load for my 2 1/2" 16ga for sharptail on WPAs. Figured I'd post up the data in case it might be helpful. Pressure testing was done by Precision Reloading:
FIO hull - New - hand trimmed to 65mm - roll crimp with PRI roll crimp tool
FIO primer
SG 16 wad
390 grains - Bismuth No. 6 taken from Kent hulls (7/8 oz +/-)
Unique Powder
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19.5 grains Unique
AVG - 1,234 fps - 5,683 psi
STD DEV - 19 fps - 532 psi
EX SPR - 46 fps - 1,370 psi
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20.5 grains Unique
AVG - 1,262 fps - 6,022 psi
STD DEV - 21 fps - 220 psi
EX SPR - 50 fps - 490 psi
