I've seen some 20 ga. loads with it listed as high as 18 to 20 gr and they show pressures well over 10K, too high for me, wouldn't shoot'em on a bet. Ballistic products (whose loads tend to be "hot" in my experience) show a 16 gr 7/8 oz load at 1220 fps and 9600 psi and a 14 gr. 7/8 oz load at 1115 fps and 8600 psi. Hodgdon lists a 14 gr. 7/8 oz load at 1200 fps, no posted pressure. At 13.5 gr. in a straight wall case I'd guess pressure to be at or under 8K. As I said, next step is send properly documented samples for testing. Only way to really know.
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