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Very Hot Topic (More than 25 Replies) A case-forming challenge (Read 8074 times)
Patrick Chadwick
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Re: A case-forming challenge
Reply #15 - Oct 29th, 2020 at 5:21am
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oneatatime wrote on Oct 28th, 2020 at 2:07pm:
Patrick, now you have to show us the rifle!


"... By popular demand ..."

Here it is. A Peterlongo target rifle. More to come, but first of all I want to deal with the case-forming and performance.
« Last Edit: Oct 29th, 2020 at 5:40am by Patrick Chadwick »  
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Patrick Chadwick
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Re: A case-forming challenge
Reply #16 - Oct 29th, 2020 at 5:37am
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OK guys, I have to admit the posting of pics in this forum is a PITA. They come out too large, or fuzzy, or too large AND fuzzy.

I will replace them if I ever find out the secret of how to do it right!
  
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ww
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Re: A case-forming challenge
Reply #17 - Oct 29th, 2020 at 9:26am
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As Sergeant Shultz would say ,velly  interesting. 
I have a rifle that I recently purchased that appears to be chambered in one of the 9.5X47R chamberings.  The chamber cast shows a neck diameter of .412 . Bertram 9.5X47R  brass has a neck diameter of. 405 and will hand seat a .374 stop-ring bullit. I would prefer to be able too load without working the necks that much. 
I've tried making brass from 8X50 lebell but necking up thins the necks even more. The next try will be with 44-77 brass from Buffalo Arms with a .513 base diameter made from 50-110 star-line head stamped brass. Thinking that these would end up with a thicker neck wall. I'm also swaging a couple of 50-90 star-line down to .515 base (PIA) and not much cheaper to see how the necks compare .
I would be interested in what the neck wall thickness increases necking down the 45-70 brass. I've made 43 Spanish using 45-90 star-line brass  using the tape (1/4 wide Teflon) and also using a 1/64 half inch dia O-ring. I think the O-ring worked better for centering and head-space the sholder. 
I need to find dies. Both forming and loading. My thoughts are CH4D and not sure if I should send a chamber cast or fire form 2 of my Bertram or order from their list.
My barrel is marked WILH: FRIEDLEIN. STOCKHIEM.  I. / OD: there are no other markings.
It will be an interesting winter project. 
I'll be watching your progress. 
WW
« Last Edit: Oct 29th, 2020 at 12:41pm by ww »  
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Patrick Chadwick
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Re: A case-forming challenge
Reply #18 - Oct 29th, 2020 at 10:29am
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"I have a rifle that I recently purchased that appears to be chambered in one of the 9.5X47R chamberings.  The chamber cast shows a neck diameter of .412 . Bertram 9.5X47R  brass has a neck diameter of. 405 and will hand seat a .374 stop-ring bullit. I would prefer to be able too load without working the necks that much."

I have a rifle like that - the seller thought it was 9.5x47R, but it turned out to be 9.6x47R Stahl - not exactly an everyday caliber!

I also think I have the answer to the neck problem. It will take a couple of days to make pics and finagle them onto this forum in a useful size.

In the meantime, if you could post detailed measurements of a fired case I might be able to hazard a guess as to the chambering of your rifle. Bore/groove dimensions taken from a slug driven through the barrel would aso be very useful.

Watch this space!

  
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Patrick Chadwick
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Re: A case-forming challenge
Reply #19 - Oct 29th, 2020 at 10:35am
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"My barrel is marked WILH: FRIEDLIN. STOKHEIM.  I. / OD:"

No such animal! But there is a Stockheim in Oberfranken.
(Ober - Franken = Upper Franconia) and I can't find any other.

Please post a good photo of the inscription!
« Last Edit: Oct 29th, 2020 at 10:40am by Patrick Chadwick »  
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ww
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Re: A case-forming challenge
Reply #20 - Oct 29th, 2020 at 12:35pm
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We'll see if this works
WW
Spelling corrected.
WW
« Last Edit: Oct 29th, 2020 at 12:42pm by ww »  
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Re: A case-forming challenge
Reply #21 - Oct 29th, 2020 at 12:36pm
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WW
  
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Re: A case-forming challenge
Reply #22 - Oct 29th, 2020 at 12:37pm
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Re: A case-forming challenge
Reply #23 - Oct 29th, 2020 at 12:43pm
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WW
  
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Re: A case-forming challenge
Reply #24 - Oct 29th, 2020 at 1:05pm
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Patrick Chadwick wrote on Oct 29th, 2020 at 10:29am:
"I have a rifle that I recently purchased that appears to be chambered in one of the 9.5X47R chamberings.  The chamber cast shows a neck diameter of .412 . Bertram 9.5X47R  brass has a neck diameter of. 405 and will hand seat a .374 stop-ring bullit. I would prefer to be able too load without working the necks that much."

I have a rifle like that - the seller thought it was 9.5x47R, but it turned out to be 9.6x47R Stahl - not exactly an everyday caliber!

I also think I have the answer to the neck problem. It will take a couple of days to make pics and finagle them onto this forum in a useful size.

In the meantime, if you could post detailed measurements of a fired case I might be able to hazard a guess as to the chambering of your rifle. Bore/groove dimensions taken from a slug driven through the barrel would aso be very useful.

Watch this space!



The rifling appears ratchet type with a measurement across the flats of .362 and .375 across the high pints . I'll see if I can get a usable picture of it. The neck. 414 , sholder around 515 , base .520 , rim .600. Around 1.85  OAL 1.250 to the neck and .875 to the beginning of the sholder..
I'll keep watching .
WW
« Last Edit: Oct 29th, 2020 at 1:53pm by ww »  
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Re: A case-forming challenge
Reply #25 - Oct 29th, 2020 at 2:15pm
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WW
  
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Re: A case-forming challenge
Reply #26 - Oct 29th, 2020 at 2:16pm
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WW
  
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Patrick Chadwick
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Re: A case-forming challenge
Reply #27 - Oct 29th, 2020 at 3:46pm
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"The rifling appears ratchet type..." 

Looks like Henry rifling to me!
  
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Patrick Chadwick
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Re: A case-forming challenge
Reply #28 - Oct 29th, 2020 at 3:53pm
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"...measurement across the flats of .362 and .375 across the high pints . I'll see if I can get a usable picture of it. The neck. 414 , sholder around 515 , base .520 , rim .600. Around 1.85  OAL 1.250 to the neck and .875 to the beginning of the sholder..."

All the measurements need to be in mm, as whatever dimensional information is available, it's in mm. So here goes:

"...measurement across the flats of 9.195 mm and 9.525 across the high pints . I'll see if I can get a usable picture of it. The neck  10.52 , sholder around 13.08 , base 13.2 , rim 15.2. Around 46.99  OAL 31.75 to the neck and 22.22 to the beginning of the sholder..."

Now to search...
  
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Re: A case-forming challenge
Reply #29 - Oct 29th, 2020 at 4:47pm
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After knowing where to look I'd agree on it having Martini Henry rifling. I learned something new. Thank you.
WW
  
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