Snagged this from pistol-training.com:
Which sight picture are you using? I use #3 with my 9mm P226 and it's dead on to 25-30 yards.
ETA: Just checked my sights, both front and rear have an 8 stamped in to them, and have "Al MH3" written on the sides.
Went to the range today and using sight image 3 I experimented with 2 different kinds of ammo at 2 different distances and each from a rested and standing position. With each test I took 3 shots.
I started out by establishing a control by using Federal ammunition from a standing position at 10 and 25 feet.
From 10 feet the point of impact was 4 inches low
From 25 feet the point of impact was 9.5 inches low
Next I switch to WWB ammo from a standing position at 10 and 25 feet
From 10 feet the point of impact was 3.5 inches low
From 25 feet the point of impact was 8.5 inches low
Now I tried the Federal ammo from a rested position at 10 and 25 feet
From 10 feet the point of impact was 2.5 inches low
From 25 feet the point of impact was 6 inches low
Then I used WWB from a rested position at 10 and 25 feet
From 10 feet the point of impact was 1.75 inches low
From 25 feet the point of impact was 4 inches low
From the results I concluded that ammo used, human error, and misaligned sights were all likely reasons the point of impact was low. Since the WWB ammo is having a closer to correct point of impact I am now only using WWB for the farther tests. Also the point of impact from a rested position to a standing position had slightly different results so I assumed there is some error in my shooting. After looking at the shooting chart, shooting low is likely because of breaking wrist down, pushing forward of drooping head. After some practice while being more alert to those things I retried shooting WWB from a standing position at 10 and 25 feet and was able to match the results from a rested position.
So I conclude that the results from using WWB from a rested position at 10 and 25 feet are a correct determination of how my P226 aims.
From 10 feet the point of impact is 1.75 inches low
From 25 feet the point of impact is 4 inches low
It's not the 1.5 feet that I was saying before, that was a bit of an exaggeration but you can see that using federal ammo from 25 feet the point of impact was 9.5 inches low. Using different ammo and correcting my shooting error the point of impact is now 4 inches low. So the way I see it, I've corrected half the error but 4 inches low at 25 feet seems unacceptable. With these results does anybody have any more input or suggestions? All help is greatly appreciated.