True Larry, the tons pressure reading would normally make one think British. However, the 40 yd velocity measurement rings of the US as does the use of DuPont Bulk & Oval powders. These readings are from the 1920's & I do not recall having seen any British figures of that era with these powders or the 40 yd velocity. I am still going to have to go with them being US figures & just wonder why the pressure was stated in tons.

Miller/TN
I Didn't Say Everything I Said, Yogi Berra