Need help adjusting front and rear sights for zero on No4 MK1/2

[Patrick Chadwick]

I've always used a center hold and zero for these types of rifles because it doesn't bring the size of the target into the equation as an additional variable that has to be corrected.

Good for you, if your eyeballs manage it (mine don't). But Parashooter has pointed out that there still remains the lighting effect to be contended with. This effect will always be present if you are using a blade foresight.

BTW, it may be worth considering that if you did use the 6 o'clock hold, then you would have plenty of room for adjustment of the backsight.