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My New Skinner Big Boy Express Sight

flat_topp
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Re: My New Skinner Big Boy Express Sight

Post by flat_topp » Thu Aug 16, 2018 6:37 pm

I'm using sight picture #1. 6 o'clock hold at the bottom of the 2" dia red or white bullseye.

All ammo is 158 gr, except the Fiocchi which is 142 gr.
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H012M Big Boy Steel .357Mag/.38Spl
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ESquared
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Re: My New Skinner Big Boy Express Sight

Post by ESquared » Fri Aug 17, 2018 9:48 am

Based on what you've explained, I'm no longer of any help, I'm afraid.

One would expect that the heavier bullet would drop more, but your lighter Fiocchi is landing lower than five (!) different 158 grain samples.

The only thing that stands out to me is that this is not all that "controlled" a set-up and that shooter movement is at play.

That said, I defer to the others here, who may have some suggestions.
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Re: My New Skinner Big Boy Express Sight

Post by flat_topp » Sat Aug 18, 2018 12:38 am

ESquared wrote: ... your lighter Fiocchi is landing lower than five (!) different 158 grain samples.
Actually, the Fiocchi is higher than five other samples, but who's counting? :)
ESquared wrote: ... shooter movement is at play.
Shooter movement is indeed a factor, but I would expect it to be randomly distributed above and below the equator for a properly sighted-in rifle, unless I am consistently doing something to pull/push the shots upward. Ignoring the errors in windage, if I just look at the vertical distribution of 80 total shots fired, I count:

56 shots (70%) above the 2" high bullseye band
22 shots (28%) within the 2" high bullseye band
2 shots (2%) below the 2" high bullseye band

Since my Skinner rear peep sight is all the way down, it seems like the logical next step is to try out a taller front sight to bring the shot groups down. Hey, it's only money, and Andy at Skinner would probably appreciate the business!
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ESquared
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Re: My New Skinner Big Boy Express Sight

Post by ESquared » Sat Aug 18, 2018 8:09 am

Yep, the data supports your next purchase! We're all doing our part to keep the economy going, aren't we?
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Re: My New Skinner Big Boy Express Sight

Post by flat_topp » Fri Sep 07, 2018 7:48 pm

So I finally received my new Skinner front sight. I ordered the one advertised as 0.650 inch. I measured the height as-received at 0.666 inch. The original Henry sight measures 0.556 inch. Here is a photo of my original Henry sight (left) next to the new Skinner sight (right). With family visiting from out of town, I probably won't be able to fit/install the new sight until later next week.
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JEBar
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Re: My New Skinner Big Boy Express Sight

Post by JEBar » Fri Sep 07, 2018 8:30 pm

looking forward to your coming range reports and comments
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Re: My New Skinner Big Boy Express Sight

Post by ESquared » Fri Sep 07, 2018 9:38 pm

Me, too, please keep us posted. Are you going to paint a square of some color or other at the top?
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Re: My New Skinner Big Boy Express Sight

Post by flat_topp » Sat Sep 08, 2018 9:05 am

ESquared wrote:... Are you going to paint a square of some color or other at the top?
No, my plan at this point is to leave it black. In fact, I also ordered and received a bottle of "Skinner Cold Blue" for touch up, in case I have to file down the front sight a bit.
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Re: My New Skinner Big Boy Express Sight

Post by flat_topp » Sat Sep 15, 2018 9:15 am

Update:
So this week I mounted my new front sight and a dovetail blank to dress up where I had removed the factory buckhorn sight. Took about 1.5 hours to do both, including filing the dovetails to fit, applying the cold blue to the shiny parts, and then tapping into place. I deliberately went slow, so as not to screw things up.
SkinnerFrontSight.jpg
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Took the rifle to the range yesterday. With the now taller front sight, I had to raise the rear peep sight 2.5 rotations to get the correct elevation. No need to file down the front sight, for which I am glad. This is 10 rounds at 50 yards after making the elevation adjustment. A 2.75 inch group … I think I'll keep it!
Target_50yds.jpg
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PT7
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Re: My New Skinner Big Boy Express Sight

Post by PT7 » Sat Sep 15, 2018 9:29 am

Definitely a keeper, flat_topp. Good job on the sight install, good results on only having to make the peep adjust and no filing to the front sight, and a great job on your target POIs!! I'd be a happy camper with all.

BTW, Congrats on conquering your rifle sight needs. Feels really cool to be the "victor," doesn't it?!? :)
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