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txhunter
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Stevens 418 Walnut Hill
May 19th, 2022 at 10:10pm
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Hope someone can help me here. My Stevens 418 Walnut Hill is doing a lot of misfiring. the only thing I can see is the firing pin does not appear to be sticking out very far. Like the pin is worn down. The only place I could find parts listed was Gunpartscorp.com and it lists it as used and out of stock. Does anyone know anywhere else to get parts? Or maybe the specs of the firing pin to have one made? Thanks
  

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uscra112
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Re: Stevens 418 Walnut Hill
Reply #1 - May 19th, 2022 at 11:44pm
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Does this model have the firing pin striking the rim at 9:00?

Wisners has firing pins for the 1915 Favorite.  The 418 was essentially a tuned-up 1915.   

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gnoahhh
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Re: Stevens 418 Walnut Hill
Reply #2 - May 19th, 2022 at 11:58pm
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I think you're on your own. Stevens firing pins are pretty simple and easily fabricated. Conversely, building up the tip of the original firing pin with a suitable weld is a viable alternative, and then filing/stoning it to shape. Guys have been executing such fixes for a century-and-a-half now. The alternative is to watch eBay or somesuch for half of the rest of your life in hopes of snagging one.
  
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gnoahhh
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Re: Stevens 418 Walnut Hill
Reply #3 - May 20th, 2022 at 12:02am
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Thanks, Phil. I always forget about Wisner and his solutions to many esoteric parts problems.
  
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uscra112
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Re: Stevens 418 Walnut Hill
Reply #4 - May 20th, 2022 at 12:08am
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That's why I asked if the pin hits at 9:00.   If it does, it's a unique part.  If it's the 6:00 pin, it'll be identical to the 1915 Favorite, I'm 99% sure.  

Either way, I can rough one out from O2 that he can finish with  files, if it comes to that


Phil
  

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Re: Stevens 418 Walnut Hill
Reply #5 - May 20th, 2022 at 4:48am
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My 418 has a firing pin that strikes at 9 o’clock, I am guessing a new made 1915 favorite firing pin might be a little short.
  
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uscra112
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Re: Stevens 418 Walnut Hill
Reply #6 - May 20th, 2022 at 5:01am
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Before we go too far, it would be worth taking the pin out and thoroughly cleaning the channel.  Might just be gunk piled up at the front.
  

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txhunter
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Re: Stevens 418 Walnut Hill
Reply #7 - May 21st, 2022 at 8:33am
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Yes, it strikes at 900. Building up the tip was my thought too. Just wasn't sure how much. The specs would be nice to have otherwise it would be trial and error. Thanks for the replys.
  

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uscra112
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Re: Stevens 418 Walnut Hill
Reply #8 - May 21st, 2022 at 9:03am
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A long-standing method is to face off the remaining tip, drill into the body and insert a new tip made from the shank of a drill,   sized to just fit the hole in the breechblock face.  If you can make it a press fit, fine.  If not, retain with Loctite.  

Protrusion with the back end of the pin flush with the back of the breechblock should be about .040 to .045.  On no account should it be more than the depth of the rim recess. 

The 418 hammer should hit hard enough that you can leave the new tip round, just chamfer the edges a bit.  If you still get misfires, dress off the sides to form a "chisel" shape.  

While you're at it, look to see if any of the rim recess under the firing pin has been peened, forming a bulge into the chamber.  There are tools to fix this.  Do not just file it off. 
« Last Edit: May 21st, 2022 at 9:10am by uscra112 »  

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yamoon
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Re: Stevens 418 Walnut Hill
Reply #9 - May 21st, 2022 at 11:30am
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I have the same problem on another rifle, what is a firing pin protrusion specs?
Thanks Mike
  
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uscra112
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Re: Stevens 418 Walnut Hill
Reply #10 - May 21st, 2022 at 3:33pm
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Another .22 rimfire?
  

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yamoon
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Re: Stevens 418 Walnut Hill
Reply #11 - May 22nd, 2022 at 11:39am
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No, it is a center fire.
Mike
  
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uscra112
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Re: Stevens 418 Walnut Hill
Reply #12 - May 22nd, 2022 at 5:53pm
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Typically .050 to .060 inches.
  

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