An interesting calculation...

[glock-ewe]

I was wondering how much movement of the front sight of my G35 (w/r the rear sight) would be necessary to move the POI 1 inch.
For the G35 the distance between sights is 7.56 inches. For a target at 50 feet from the rear sight, the tangent of the angle formed by 1 inch and 50 feet (600 inches) is 0.001666. For the distance between the sights, it takes only 0.0126 inches of movement of the front sight to move the POI 1 inch.
I am sure I do not hold the pistol that steady. Amazing I can hit the center of the target as often as I do.

[Sikhed]

That's because you are not using dum-dums.
Must be using smart ammunition; it knows where to go:supergrin:

(interesting post though. Never considered the point you made till after reading it)

[JohnJak]

I'm amazed.

[Ol' 12-toes]

The human eye is pretty good at centering sights and matching heights of squared front and rear sights.

Your example leads to a 2" group at 50' -

Respectable combat accuracy, but not outstanding for bullseye shooting.

So, really good shots do rather better than that.

[JDG]

I did the math on my CZ75 sight radius, and .010 gave me
1.5" at 25yrds. Math is fun!:supergrin:

[Custom Glock Racing]

Remember bullets arc and how much depends on powder, pressure, weight and other factors.