HW/Weihrauch My new gun has droop.

😁

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After running out of elevation adjustment on my peep sight on my very new to me Hw50 I eyeballed the barrel angle. Sure enough it's got droop. You can see it here.
View attachment 596385
This is not uncommon in late model Hw50s so I figure I'd run through it here on the forum for the benefit of others. The cause on this one is the fixed wedge that sets the lock up isn't set properly. It's rotated so the breech sits on its high corner. You can see the witness mark under the left side of the breech step between the chisel and breech seal.
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You can see the matching witness mark on the high point at the top of the fixed chisel.
View attachment 596387
The last way I know to address this is to bend the barrel up a tick. This gives some people the Willy's but I do it all the time.
Well Ron,
This has likely been a problem with Weihrauch spring piston guns since the 1950's ?
If there's nothing significantly wrong with the lock-up or cocking arm ...... Just bend the barrel and be done with it :).
After a quick evaluation, I think CDT and NCed from the GTA wouldn't hesitate on doing just that.
I realize this post was to help others, but simple solutions are often effective at saving $$$ and time.
 
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Well Ron,
This has likely been a problem with Weihrauch spring piston guns since the 1950's ?
If there's nothing significantly wrong with the lock-up or cocking arm ...... Just bend the barrel and be done with it :).
After a quick evaluation, I think CDT and NCed from the GTA wouldn't hesitate on doing just that.
I realize this post was to help others, but simple solutions are often effective at saving $$$ and time.
100 percent agreed. I'm not reluctant to bend barrels. Its part of every tune I do (if necessary). My shortest front sight doesn't work so my only choices are to bend the barrel or machine the fixed lug lower. The latter without a proper mill is chancy yet I'm still considering it and thinking about the tools at my disposal. I'm sure i could get it with my small motor tool and some diamond bit. The repair would work but would likely be too ugly for my prode. I just wish the fixed block was more accessible so I had room to flat file.

I got you and I'm with you, I'm just thinking aloud.
Be well
Kirk
 
Today I looked at the droop situation and the rifle more closely. The fixed block isn't as rotated as much as I thought. I checked it by standing a small machinist rule on it. They're was no noticeable lean to it.
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I painted under the breech block where it sets on the fixed chisel and looked for color transfer. The left side corner is high but not a lot. I'll probably leave well enough alone and tweak the barrel.

The gun during chrono testing shot these 25 yard groups. Shot numbers and pellet weights noted in black marker. Not bad for sporting peeps and goofing around.
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The gun has been left cocked for about a day with no appreciable change in cocking effort. So I'll probably open this up today before tweaking the barrel. A change of power and the accompanying harmonics might change the point of impact for the better or worse.

I did notice the rifle is missing the screw cup under the forearm screw.
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It should look like this.
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If anyone has an extra please reach out to me. It'd be much appreciated. If not I'll put a standard washer under it to protect the wood.

That's it so far for today. Time to take this apart and see what I'm working with. Its almost a shame to since it shoots so nice. But I did buy it specifically to "detune" into a plinker. God I hate using the term detune, but it's universally understood.

Be well
Ron
 
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I got the gun apart. The "tune" is all factory parts with a ship ton of tar.

To its credit it was done well and worked well. Notice the clean seal face.
20250927_122814.jpg

How long it would have worked well is conjecture. I've had several lube tuned guns sent to me. They often work well initially but overtime the grease can get ahead of the piston seal, combust and burn through the piston seal. This was extremely common with factory overlubed Weihrauchs in the late 20teens and early 2020s as well. They seem to have a bettee handle on it now.

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I won't reassemble this gun until I either find or buy a kit for it. I'm leaning hard towards the ARH plinkers kit with a Vortek piston seal. There's no sense in playing with this greasy mess.

Be well,
Ron
 
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Droop update. Given this is probably my gun forever I rolled the dice and took a motoe tool to the fixed wedge that sets the lock up angle.
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After that I cleaned it up with a sanding stick.
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And then cold blued it.
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I apparently didn't go too far because the gun still has some droop to it and locks up on the block like it should.
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I will see if this gets me to where I need to be when its back together. Tomorrow I'll make a decision and order a kit for it.

Be well
Ron
 
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