I have a Model 28 that was converted to .45 ACP. It currently has a .126 high rear sight blade and shoots approx 4-6 inches low @ 21 ft even with the sight almost fully elevated.

Should I go with a .146 or .160 high blade?

All replies appreciated

__________________
YUUUPP!

Dawson Precision has instructions for figuring sight height that might be helpful.

http://www.dawsonprecision.com/image...ightHeight.pdf

Neither. When you're "4-6 inches low @ 21 ft" you'd need a .196 rear blade. Yes, there is a .196.

SIGHT SLIDE, REAR, .196" | Brownells OOS but I think Midway also carries them.

I am going to check out the Dawson sight calculation and see what comes up. Tomcatt, based on your input, I'm thinking .160. This allows for any pilot error.

Thanks

__________________
YUUUPP!

At 21 feet with a 4 inch sight radius you will need to raise the rear sight by .063 inches in order to raise the point of impact 4 inches. This means a .199 rear sight blade.

If you are getting a plain blade (no white outline) why not get the tallest and file it down to what you need even if you have to recut the notch.

The Dawson calculation sez that for a four inch drop w/ my 5 7/8" sight radius I need a .156 higher sight. Going w/ a .160 blade from S&W. The taller blade from Brownells is out of stock, No B/O. That should get me there. Thanks again for the input.

__________________
YUUUPP!

A .160 won't get you very close only raising your POI by 1.6". My math says a .196 would raise your POI right at 3" at 21 ft. Actually less if you run the rear sight back down into it's range of adjustment and definitely not 4-6" but all you're gonna get without shortening the front blade.

Midway shows the .196 as "no back order" you can BO at Brownells I tried it.

If you want a .196 PM me. I have a .196 with a standard notch and one with the notch widened to .140" (+ .015") and knife edged. Much better sight picture on a 4" gun with a .125" wide front sight.

As of last week, all S & W sight blades at Brownell's and Midway are out of stock. I called S & W and they are out of stock with an anticipated delivery of 6-8 weeks......