Jack and DK,
While odd to put it as tons/meter rather than tons x meter, plugging in those numbers gives about 160,500 ft.lbs. That is on par with energies listed for 37x263B rounds. The “1,630g” as grams would be heavy for the projectile and would give about 330,000 ft. lbs. at 740m/s. Having 160,500 ft.lbs. with 740m/s would mean a 795 gram projectile. Perhaps “1,630g” is weight in grains of the HE component?
Jack may well have it as far as the “t/m” goes and that’s an interesting new unit for me! This post earlier had my comments due to my math dysfunction and I started thinking it could possibly be the times/minute loaders must stuff a (6) round clip in the gun. That sort of works too. Perhaps someone on the Forum is able to read the text?