Adjusting the Sights

[Gearhead Jim]

I've got a new 19-9 with the 4.2" barrel and typical adjustable sights.
Tomorrow I'll go to sight it in, but with the current shortages/cost of ammunition it would be nice to do it with minimum rounds.

How much does one click (well, mush) of the adjustment screw move the POI at 25 yds?
And, clockwise moves the elevation down, which way does clockwise move the windage?
Thanks!

 

[Protocall_Design]

Clockwise moves the sight blade and point of impact to the right. Probably around 3/4" to 1" at 25 yards, every barrel length is different and I don't have time to do the math right now. The elevation and windage screws are 80 threads per inch and there are 6 clicks per revolution.

 

[Scharfschuetzer]

Protocall has about covered it.

If you really want to get technical, then the formula below will help, but you'll probably need a dial caliper with you to make the measurements on the revolver. Probably not worth the effort.

Sight Radius in inches / Range in inches X error on Tgt in inches = sight correction in thousandths of an inch

Example for a pistol: 7" / 900" (25yds) = .0077" X 10" (error on target) = .077" correction on sight

 

[Gearhead Jim]

That should be good enough. Thanks.