Uberti Walker with target

[LonesomePigeon]

My Uberti Walker with a target. This shows the best accuracy I could achieve at 25 yards with a sandbag rest. Point of aim was the black square at the bottom of the target. The load was 45 grains Goex 2F, cream of wheat filler, .457 Hornady round ball and homemade lube of lamb fat, beeswax and olive oil over the ball.

I believe the chambers are typically undersized. I'm happy with the group size but I wonder if I reamed out the chambers would it bring the POI to the center?

 

[rodwha]

Very nice group there!

I don't see how reaming the chambers would alter the POI, but I'd do it regardless if they are indeed undersized.

Were it me I'd file the notch in the hammer a bit lower and see what that does to your POI.

 

[Gordon]

file the hammer notch lower biasing your cut to the right

 

[99whip]

That is a nice group indeed.

Just out of curiosity what is the rough distance from POA to POI?

I have been told (perhaps wrongly) that Uberti tends to have much closer bore/chamber sizes? Don't really know if it's true or not.

 

[RecoilRob]

Someone somewhere was talking about the modern repro guns always shooting high even when using the same type of front sight and attributed it to the hammer not coming back far enough to lower the notch. Wondering if some careful parts substitution of trigger with longer sear could hold the hammer back and down a bit more and get you closer to POA? That 'should' work....but might not be practical to accomplish.

 

[45 Dragoon]

RR,
Not just repros, the first gens too.

Changing the hammer would for sure change the sight pic., and the timing. No two hammers (and the rest of the parts) are the exact same. Why not just "tune" the sight you have? I think if you want to move the group to the left, your rear notch should be opened to the left as well and slightly deeper to lower the group.
The "group" moves with the rear sight, or opposite the front sight.

Mike
www.goonsgunworks.com
Follow me on Instagram @ goonsgunworks

 

[Crawdad1]

Great group!!!!!!!!!!! You have a keeper there bud!!!!!!!!!! The rear hammer notch should be cut deeper and ever so slightly to the left. Just a hair.

Keep that Colt!!!!!!

 

[Curator]

Uberti Walkers that I have worked on slugged at about .456" in the grooves. You are getting pretty good accuracy because the filler you used sealed the under-size ball in the barrel's grooves and prevented blow-by. Reaming the chambers to .457-458 won't bring the POI to match the POA but will allow accuracy with more powerful loads, and better accuracy with fillered loads that seat the ball flush with the chamber face. The down side to this is trying to find a good .460 round ball mould. I solved my Walker bullet problem by having LBT make a custom mould for a flat-base ball that had a cylindrical section that matched my chamber diameter and a round-nose profile that was .002" over that. I got a bullet that loaded easily and had longer area in contact with the rifling. I still needed to add height to my front sight to get the POI to match my point of aim.

 

[44 Dave]

Listen to 45 Dragoon, hammer travel and timing are set together. Mike puts action stops in his work to prevent damage from hammer over travel.

 

[Panzerschwein]

That group is most excellent.

 

[LonesomePigeon]

By the way, this gun has been worked on by Mike "Goon" and the action is excellent. I will file the rear sight notch.

 

[LonesomePigeon]

99whip "Just out of curiosity what is the rough distance from POA to POI? "

25 yards.

 

[Crawdad1]

I cut this 'V' in my 1860 Army repro for sighting in purposes and after sighting in I bought a new hammer and recut the sight to clean it up after getting the 'V' where the revolver wanted it.

 

[45 Dragoon]

Thanks LP for the mention!

Looks like you have a nice setup!! (Nice Walker too!!)


Mike
www.goonsgunworks.com
Follow me on Instagram @ goonsgunworks

 

[Hellgate]

Do what crawdad1 says and cut the hammer sight notch a little bit to the LEFT to line the sight picture up with where the ball are hitting. You are only going to need about 2 inches of windage correction on the hammer notch. It'll just be a couple hundredths.

The formula for sight correction that I use is this:
Correction (C) is to sight radius (S) as error (E) on the target is to the distance (D) to the target. All units in inches. i.e.
C/S=E/D solve for C C=SE/D
For example if the gun shoots 1 foot high at 25 yards you first measure the distance from the front sight to the rear sight. Let's say 10 inches (really around 10.5) on a Navy.
25 yards=12 (inches) X3 (per foot) X25 yards=900 inches. So, the total correction of either or both sight is:
C=10X12/900=.13 inch That means .13 inches of correction to what you already have on the gun.

 

[Crawdad1]

Excellent formula Hellgate!!! Who says you can't adjust a Colt's sights, because we just did!!!!