Why different height sight blades for Lee Enfield's.??

[Parashooter]

. . . Why not 1 standard blade with all adjustments using the rear ramp. . .

The basic reason is that no two riflemen see and perceive exactly the same. Small individual variation in shooters' individual concepts of "correct" sight picture and alignment mean that the same rifle will shoot to divergent points when aimed and fired by different folks.



If soldiers simply made corrections with the rear sight, its range markings might no longer be useful in a combat situation where troops estimate or are given the range of targets on which to fire.

[WarPig1976]

Makes sense, so that's why Enfield's / Springfields / SKS etc have either different height blades or basically a screw. I assumed it was to zero the rifle at a given range,say the CO wanted all the rifles zeroed at 100yds they would all get the tall one and so on. Sounds like it was more to " customize "each rifle to an individual...