sight theory
I hope this doesn't get too long winded, but this understanding is pretty important to know why the front sight is so important.
This doctrine was "learned" to my by Bob Chow, one of the most note worth .45 gunsmiths of our times, and a National and World class pistol shooter.
SIGHT ALIGNMENT IS MORE IMPORTANT THAN SIGHT PICTURE.
Sight alignment is front sight to rear sight relationship.
Sight picture is the sight picture to the target alignment.
It is hard to believe when you are shoot at a tiny, tiny target fifty yards away, and the black looks like it is off center to the perfectly aligned sight that you will still shoot a ten. But.....
A pistol is a short weapon. The alignment of the front sight to the rear sight is the center line of a triangle. The tip of the triangle is the rear notch. The base of the triangle is how much the front sight is off that centerline. So with a four inch barrel, you are getting a bigger deviation than a ten inch barrel, because that deviation is the tip of the triangle extend out to infinity. At fifty yards that deviation is the triangle multiplied by the four inches out to fifty yards. Again, just imagine the tip of the triangle at the rear sight extending to the base at the target. The width of the triangle is the error by how much your sight alignment is off. Close combat range, it won't matter so much, but it might be the difference between inch groups and six inch groups.
SO SIGHT ALIGNMENT ERRORS CREATE A TRIANGULAR DIFFERENCE DEPENDING ON THE DISTANCE TO THE TARGET.
Now, if your sight alignment is perfect, or just a hair off, then the difference of the of the sight to shot error is more of a parallel line. More like a rifle.
So even if that tiny bullseye looks off to your eyes, the difference in the shot theoretically (if the sights are perfectly aligned) is the same as the wobble in your hold. Move a quarter inch and in a parallel line the shot difference is only a quarter inch. It might look off to your visual sense, but you have to trust in that fact.
IF THE SIGHT ALIGNMENT IS PERFECT, BUT SIGHT PICTURE IS OFF, THE ERROR IS A PARALLEL DIFFERENCE.
And so that is why in pistol shooting, it is taught that focus on the front sight is of the paramount importance..... BECAUSE SIGHT ALIGNMENT IS MUCH MORE CRITICAL THAN SIGHT PICTURE.
Even master class shooters will allow for the wobble and take the shot as long as the sights are aligned. They do not do the rifle procedure of hold and wait for the sight picture to be perfect.
There was a period where I no longer could see the fifty yard target bull.
It was a grey blur, and I had to wear close up glasses to clearly see the front sight. But by just centering on the target mass, I was still able to shoot 9's and tens by the focus on the sight alignment. It was total trust.
I am sure that many here already know this, but there are many new shooter who do not understand this theory.
Not trying to be the know it all here, just hoping to pass along some very valuable information that helped me to totally understand why focus on the front sight is so critical. Without this knowledge, it is just doing what has been told.