Military zeroing of the No. 4 - inconsistent data?

[M94/14]

The .565" grid dimension is there to help with the calculation for selecting the correct front sight blade, if the impact is out of the circular area shown (which is incidentally 2.26").

The Mk2 sight POI differences can be boiled down to two different countries, using two different sight in POI numbers. The Canadian POI numbers obviously print a bit higher on the target than the British sight in numbers, and may fit in with some desire on their part to have the POI hit around 2.5" above POA at all distances, or possibly a 6 o'clock hold. I can't see the ammo specs being that far different. Unless you're going to battle, I wouldn't worry about zeroing with a bayonet.

The other numbers, relative to zeroing with the slider sight apertures set at 200yds., are pretty close to what I've experienced when fired at those distances.

If you sight in with the sight slider aperture set at 200yds., using the British sight reference chart, you should find that the battle sight on the mk1 or mk3 sight to be on at 300yds using POA hold.

Biggest thing to decide on, is whether you favor POA hold or 6 o'clock hold on targets, and that alone could account for the discrepancy in the numbers. Once you get zeroed for either type of hold, you should find the sight graduations to work relatively well, as long as the projectile your shooting has a BC similar to that used with the Mk IIV round.