Good point Larry. I probably didn't word my post the best, it should have read proofed for a 3-ton load. As the guns themselves are marked 3 Tons it is rather normal to refer to them as a 3-ton proof, meaning, of course, the prescribed pressure level of the shell they are intended to fire.

Not truly that confusing as IF the guns had been proofed with only 3 tons of pressure there would have been no shells they could have fired & been "In Proof".

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