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What’s with this rifling? #5409123 04/20/20 10:24 PM
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JHZR2 Offline OP
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I’m a fan of the M1917 revolver, and came upon a modern S&W 22-4 model of 1917. Not quite like my real M1917, but an interesting item. Color case hardened frame too.

But looked down the barrel... what gives with this rifling?

[Linked Image]

Is this tooling marks? Cutting marks? Cleaning marks? A barrel that got away without being lapped smooth?

The lands are smooth. It’s dirty in there but doesn’t look like it has been shot much.

Thanks!

Re: What’s with this rifling? [Re: JHZR2] #5409165 04/20/20 11:46 PM
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Might just be the way it was machined, and normal for that gun. Do some Googling to see what's out there. If it's normal, I'd think you could find some talk about it on the 'net.

One thing for sure ... the bullets are really locked into that rifling when screaming down the barrel. grin2

Re: What’s with this rifling? [Re: JHZR2] #5409168 04/20/20 11:51 PM
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Reddy45 Offline
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Lead buildup and then someone pushed a copper brush down it?

Re: What’s with this rifling? [Re: JHZR2] #5409196 04/21/20 02:08 AM
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AlaskaMike Offline
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I vote for what Reddy45 says--leading with brush marks.

Re: What’s with this rifling? [Re: JHZR2] #5409263 04/21/20 06:50 AM
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I had a similar issue with shooting some poorly jacketed ( i don't remember what brand but it was a bulk box) .22 ammo in my Walther. Rounds hitting the target all over the place at 20 feet, some sideways, by how the paper looked.

It was lead build up . It was so tight i was lucky not to have blown up the barrel. I could not get a .22 brush in it. I had to buy a .17 brush and start with that, and even that was hard. I don't brush my barrels, but i had no choice in that case. Now i only shoot quality jacketed ammo.

Last edited by spasm3; 04/21/20 06:50 AM.

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Re: What’s with this rifling? [Re: JHZR2] #5409278 04/21/20 07:16 AM
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JHZR2 Offline OP
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Hmmm... thanks. I never shoot straight lead, synthetic jacket or FMJ for me. Perhaps that’s why I’ve never seen such a thing.

Re: What’s with this rifling? [Re: JHZR2] #5409297 04/21/20 07:43 AM
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Driz Offline
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Originally Posted by JHZR2
Hmmm... thanks. I never shoot straight lead, synthetic jacket or FMJ for me. Perhaps that’s why I’ve never seen such a thing.



Just powder coat them using the Shake n Bake method. They don’t always come out looking like they’re plated but there’s always enough to keep the lead where it belongs. I’ve been using nothing but Soft lead with no more hardening then coming straight out of the mold into a dish of water lately. They are light to moderate loads but no sign of lead anywhere. The rounds I’ve salvaged still have powder coat in the lands Intact.

Re: What’s with this rifling? [Re: JHZR2] #5409335 04/21/20 08:45 AM
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I would guess it is tool marks.Then the basic question how does the gun shoot. You guy think brush marks?


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Re: What’s with this rifling? [Re: JHZR2] #5409340 04/21/20 08:50 AM
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+1 on leading with brush marks. Steel brush, I would guess.


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Re: What’s with this rifling? [Re: JHZR2] #5409364 04/21/20 09:24 AM
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No way this is lead fouling. This is the way the gun was made. Probably before they figured out it would lead to extra deposits in the grooves. I'd say to keep this one very clean in the future and I'd also venture that it is rather rare. Send that picture to the NRA hopefully it wil show up in American Rifleman. I'd love to hear what they have to say about it!

Re: What’s with this rifling? [Re: JHZR2] #5409402 04/21/20 10:25 AM
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It's ruined. I'll give you $50 for it if you pay shipping. cheers

I have never seen anything like this. A little Hoppes 9 and some elbow grease may
solve the "problem." A very famous tribologist likes Butch's Bore Shine. I got some
at his recommendation. Do NOT sniff the vapors!!! LOL


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Re: What’s with this rifling? [Re: spasm3] #5409412 04/21/20 10:39 AM
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wwillson Offline
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Originally Posted by spasm3
I had a similar issue with shooting some poorly jacketed ( i don't remember what brand but it was a bulk box) .22 ammo in my Walther. Rounds hitting the target all over the place at 20 feet, some sideways, by how the paper looked.

It was lead build up . It was so tight i was lucky not to have blown up the barrel. I could not get a .22 brush in it. I had to buy a .17 brush and start with that, and even that was hard. I don't brush my barrels, but i had no choice in that case. Now i only shoot quality jacketed ammo.

I've had this happen to a .22. I'm not going to explain how I know, but my advice is do not use steel wool to scrub the lead out of the barrel. Steel wool scratches stainless barrels. Use bronze wool, you can get it from Brownells and it's very soft, which won't scratch your barrel. Many things I know I've learned the hard way.

Re: What’s with this rifling? [Re: JHZR2] #5409423 04/21/20 10:54 AM
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I leaded up a 22 a while back, my googling led me to use small pieces of Chore Boy brand copper scrubbing pads to gently clean out the lead. I had long shards of lead come out. Make sure to get the specific pure copper scouring pads, similar to bronze wool, I believe the copper won't scratch your barrel.

To my untrained eye, the ridges in the rifling look like tooling marks, they just seem to evenly spaced to be anything else. Although, I suppose frequent brushing with bristles too hard may cause that too.

Re: What’s with this rifling? [Re: JHZR2] #5409430 04/21/20 11:06 AM
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You can use the bronze chore boy scrub pads from the grocery store wrapped around a nylon or bronze brush to scrub that out. Get ahold of some Lewis de leader or mix up some vinegar/peroxide (only for a stainless barrel), plug the end of the barrel and fill it up, let it soak for 5 minutes and then scrub. Check your progress and repeat, 2 rounds of that and you'll know if it's machine marks or lead.

Re: What’s with this rifling? [Re: JHZR2] #5409438 04/21/20 11:21 AM
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Peroxide and Vinegar will effortlessly de-lead barrels but creates an extremely toxic waste product that has to be disposed of properly.

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