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Curio & Relic/Black Powder Curio & Relics and Black Powder Firearms, Old School shooting fun!

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Old 02-15-2013, 2:29 PM
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Josh Smith Josh Smith is offline
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Default The Awaited Rigby-Style Mosin Rear-Sight Range Report!

Hi Folks,

I've been asked by folks here and elsewhere for a range report for this sight.

Conditions were about 34F, light wind, and overcast with snow flurries turning into snow showers.

Distance was 75 or 80 yards. Though I lasered it at 75 yards, my shooting position changed enough to extend the range a bit. It may not be 80 yards, but it's close. I've not done the math as I don't believe there's enough difference to matter.

I used for the first time a new handload. My accuracy load is 51.2 grains H4350 pushing a 174 grain Hornady Match. I need to ladder test the SMK/Varget load before declaring it as good as the Hornady Match/H4350 load, but went ahead and shot it for these groups as I was out of the Hornady loads.



I'm starting with the second group first.


Around playing card size, 10 shots, 2 fliers.

I shot this group in a snow shower. As I've mentioned elsewhere, I'm still getting over a cold. I was laying on a wet blanket with snow covering me and breath discipline had gone from difficult to near-impossible.

Now that the above embarrassment is out of the way, here is the first group:


Well inside the size of a playing card.

Well inside the size of a playing card, I really didn't need to work at this group. I just started flinging lead downrange. Natural respiratory pause was more like natural respiratory *cough*, so I did have a few problems. All-in-all though, for a fast-acquisition ghost ring style sight, this was acceptable.

Will this rifle shoot better? Yes, it will. It was not the fault of the hardware, but rather an inability to control my breathing as well as I usually can.

Even with the fliers, both these groups are on par with many Mosin groups I've seen posted around, and better than many.

I hope to get back out again soon, cold-free on a sunny day, to see what I can really do with this new rear sight.

I hope this has satiated some curiosity. Questions are more than welcome as I'm sure I've left some things out; I'm just not in that "writer's zone" I usually find myself in when I write reports of this nature.

Thanks,

Josh
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Old 02-15-2013, 3:02 PM
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I'm a little surprised the bolt/safety locks up reliably enough to give you a repeatable sight alignment. I'm not suggesting it doesn't, just that I would never have thought to put a sight there. Cool!
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Old 02-15-2013, 3:36 PM
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Hello,

It was a popular mod 60 or 70 years ago.

Lockup is achieved through a spring-loaded ball bearing.

There was an adjustable stud in the prototype, but the ball bearing just works better. It holds grease and dispenses it like a ball point pen, as needed.

Vertical stabilization is achieved by polishing the heck out of the sear engagement on the cocking piece. There is a certain burr found on there that makes the sear nose snag it and pull it down. Doing away with the burr solves the problem.

Those are the problems not solved 60-70 years ago when the first generation of cocking-piece-mounted sights came along, and why they got a bad rep.

Josh
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Old 02-15-2013, 3:40 PM
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Josh, I had a pic I can't find anymore, of a Rigby style sight like that on a Mosin. One of the Aussie members on Mauser Central has a line on someone still making them for the Mausers.
You need to do a comparison, between the stock sights, and that one. Then repeat it on another rifle, with that cocking piece to show the advantage.
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Old 02-15-2013, 4:06 PM
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Just realized that's a sling stud you're using for a sight, right? Very clever .
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