For those who do not have Handbook of Ballistic and Engineering Data for Ammunition Vol. 1 and Vol. 2, 1950 (lots of diagrams for 20mm to 105mm) here are the links: http://www.dtic.mil/dtic/tr/fulltext/u2/a955368.pdf and http://www.dtic.mil/dtic/tr/fulltext/u2/a955369.pdf
Brian
Brian