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Very Hot Topic (More than 25 Replies) Next Project, Hepburn Walker Patent Configuration (Read 32675 times)
bobw
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Re: Next Project, Hepburn Walker Patent Configuration
Reply #300 - May 3rd, 2025 at 12:38pm
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This is probably the last picture for awhile.

I got the original back together yesterday for the return trip to the owner, so took a comparison picture of the two.

The big differences are the lever, pistol grip, hammer and a larger barrel.  I also pulled the top front radius down slight more.  This was required with the larger octagon barrel in order for it to look correct.

The magic of photography makes mine look slightly larger but it isn’t.  Measuring them, mine is 20 thousands taller at the front, but the same smaller at the back.  I would guess original manufacturing could varied this much after final shaping and polishing .
Bob
  

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Re: Next Project, Hepburn Walker Patent Configuration
Reply #301 - May 3rd, 2025 at 1:11pm
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Simply incredible. Again, thanks for sharing your time and effort with us.  Krag
  

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marlinguy
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Ballards may be weaker,
but they sure are neater!

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Re: Next Project, Hepburn Walker Patent Configuration
Reply #302 - May 3rd, 2025 at 1:39pm
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Again, can't wait to see this at Greeley Bob!
  

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calledflyer
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Re: Next Project, Hepburn Walker Patent Configuration
Reply #303 - May 3rd, 2025 at 5:16pm
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mighty darn fine work. gonna be hard to sit tight waiting for a bit more. but, if you could, get some info for us on the neat barrel sight on the original. that'd fill some time for us lonely disciples.
have a great time at the show Smiley
  
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jhm
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Re: Next Project, Hepburn Walker Patent Configuration
Reply #304 - May 3rd, 2025 at 8:24pm
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May have been asked before but do you have any idea of how many hours work you have in it?


JMH
  
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bobw
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Re: Next Project, Hepburn Walker Patent Configuration
Reply #305 - May 4th, 2025 at 12:25am
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jhm wrote on May 3rd, 2025 at 8:24pm:
May have been asked before but do you have any idea of how many hours work you have in it?


JMH


I don’t know, don’t keep track. I first started studying the original at the end of October last year, according to picture time stamps.  The first month was spent disassembling, measuring and making sketches of every part.  Then I started cutting steel from there.  But, lots of thought and time went into just trying to figure out how make some of the machining cuts on the inside of the frame and trigger guard.  Just figuring out how to machine some of the parts also took lots of time.  Once all the parts were made, getting them to work together was a big challenge.  There were some real challenges, and I didn’t write in detail about any of that in this thread, because honestly it would be like writing a book.  

As an example, one of these bigger issues was the firing pin hooking on the hammer pivot when closing the breech block and locking up the action.  I think I touched on it at one point but for awhile it was a real concern if I would get it worked out.  Once I did the action has worked fine ever since.  The funny thing is I can feel it at times but it now never cause an issue but, after assembling the original, I found it does, and feels, the exact same way.  So Walker and his helpers probably had this same issue and worked through it, apparently finding the same solutions as I did.

Back to your question.  A guess would be in disassembly, measuring and drawing parts, machining, filing, fitting, shaping, thinking and working out the issues….probably somewhere around 500 hours so far.  I still have to stock the gun and do all the many thing required to make it right….at least right in my mind.

But this time doesn’t bother me because that’s not what it’s about for me.  For me it the challenge to see if it can be made on manual machine and with hand tools somewhat similar to how Walker’s team would have done it a around a 140 years ago.
Sorry for the long answer to your question.
Bob
  

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Re: Next Project, Hepburn Walker Patent Configuration
Reply #306 - May 4th, 2025 at 7:25am
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You are right on the machining processes. Mind you these guns were built on manual normally belt driven machines. A lot of work was also with files and hand fitting. It is just amazing at what you have accomplished. I think it is probably one of the best series on a gun build here. I have followed every step. I have just become enamored with the Hepburn in the last couple or three years. I have two and am building a 22LR Hepburn now with a lot of peoples help from the site. Again just a great series...



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bobw
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Re: Next Project, Hepburn Walker Patent Configuration
Reply #307 - May 5th, 2025 at 12:20pm
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calledflyer wrote on May 3rd, 2025 at 5:16pm:
mighty darn fine work. gonna be hard to sit tight waiting for a bit more. but, if you could, get some info for us on the neat barrel sight on the original. that'd fill some time for us lonely disciples.
have a great time at the show Smiley


Here are some better pictures of the barrel rear sight.  There are no marking that I can find other than the "O" on the one side.  I haven't looked at Tom Rowe's Hepburn book to see if anything is mentioned about the sights.  I'll let someone else check that.

It does have windage but I could not get it to move and was not going to try too hard for fear of damaging the sight.
Bob
  

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bobw
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Re: Next Project, Hepburn Walker Patent Configuration
Reply #308 - May 5th, 2025 at 12:25pm
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Couple more of the sight.

I did not disassemble this sight but did measure several parts of it, as well as the front barrel and tang sight.

So if any one want to make a sight like this, I have some of the info you would need.
Bob
  

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calledflyer
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Re: Next Project, Hepburn Walker Patent Configuration
Reply #309 - May 6th, 2025 at 3:19pm
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thank you for indulging my request. it's a very unusual rear sight, and when I spotted it I simply wanted to have a good look at the little gem. as ladder sight go, this is about top grade. have a nice trip to the show- wish I could go and see your work.
  
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bobw
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Re: Next Project, Hepburn Walker Patent Configuration
Reply #310 - May 6th, 2025 at 4:03pm
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I also did not mention that I think there is something missing.  There’s an empty dovetail on the elevation bar.
Bob
  

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calledflyer
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Re: Next Project, Hepburn Walker Patent Configuration
Reply #311 - May 6th, 2025 at 6:42pm
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so there is! even more unusual. and interesting.  Huh
  
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AJ
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Re: Next Project, Hepburn Walker Patent Configuration
Reply #312 - May 7th, 2025 at 12:45am
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bobw,

Looks like an identical rear sight on the Hepburn on this site:  (You need to Login or Register to view media files and links)

It also has an empty dovetail on the ladder.
  
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bobw
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Re: Next Project, Hepburn Walker Patent Configuration
Reply #313 - May 7th, 2025 at 10:28am
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AJ wrote on May 7th, 2025 at 12:45am:
bobw,

Looks like an identical rear sight on the Hepburn on this site:  (You need to Login or Register to view media files and links)

It also has an empty dovetail on the ladder.


It sure does. I wonder who made it?

The gun I have copied is also a military version and has a very similar front sight on it, but without the level.  This gun also appears to have less windage travel than the one in your link.

The base of the tang sight looks to be the same between the two guns also.  The staff is different.  The gun I have was also fitted for a stock heel sight, but the holes have been poorly plugged.
Bob

  

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Re: Next Project, Hepburn Walker Patent Configuration
Reply #314 - May 7th, 2025 at 1:47pm
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bobw,

I suspect that the empty dovetail is designed to hold an aperture sight, which is removable in order to use the open “v” sight and the tang sight.  I can see the design being such that an aperture eye piece fits into a male dovetail, which slips into the female dovetail on the ladder and is locked in by screwing the eyepiece in.  Just a guess though.
  
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