Military zeroing of the No. 4 - inconsistent data?

[Rick]

Rick
Is that Canadian zero pamphlet built on using M7z ammo

It's a .pdf copy of the pam, the info page says "Prepared under direction of the Chief of the General Staff", publishing date 1945. I did searches on the word "ammunition"; there are only three instances of the word ammunition in the entire 242 pages of the book. No instances of Mark VII, M VII, etc at all. Nothing suggesting that the zeroing data might be for a specific, newer ball ammo.

To make a +8.5" at 100 yards zero work, you have to input a BC of .425 and a muzzle velocity of 2200 fps to have that result in a 300 yard zero.