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westerner
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Correcting sloppy chamber.
Jul 17th, 2015 at 12:20am
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Taken from thread "Smokeless Loads-Shiloh". ChrisBs thread mangled enough already.

SSShooter wrote on Jul 16th, 2015 at 8:39pm:
westerner wrote on Jul 16th, 2015 at 1:38am:
Here's a RMC 38-55 case failure. Straight black powder. Gas cut a ring in the chamber.    

      Joe.

That chamber can probably be "fixed" with a 38-56 reamer.


Got to thinking about that. Wouldn't work for two reasons. The gas cut ring in the chamber effects nothing. The 38-56 is almost identical length with the 38-55. Reaming to 38-56 would do nothing to the neck area in the existing chamber.

The problem with this Badger barrel is the oversize neck. I'm sure that's why fixed BP loads are just "so so". I have a 38-55 reamer sized correct for the modern .38 barrels.

         Joe. 


  

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SSShooter
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Re: Correcting sloppy chamber.
Reply #1 - Jul 17th, 2015 at 9:52am
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Another option, if you don't want to set the barrel back, is the 38-70, which has a longer case. DanT was starting to have some success with his at long range (1000yd) when he met his untimely end a couple of months ago (may he RIP). If you want to stay with the 38-55 you are stuck with setting the barrel back a turn or two. The downside of that is often the need to move whatever is attached to the bottom of the barrel (main-spring and/or forearm attachment) and possible loss of the tulip that many rifles have right at the breach end of the barrel.
  

Glenn - 2x CPA 44 1/2 w/22LR (Shilen ratchet-rifled & Bartlein 5R rifled), 38-40RH & 38-55WCF (Bartlein 5R rifled) & 40-65WCF (GrnMtn 'X') barrels
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John Taylor
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Re: Correcting sloppy chamber.
Reply #2 - Jul 17th, 2015 at 3:48pm
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If the problem is the chamber only and not in the throat then it can be lined and recut. 
The 38-70 would most likely clean up the chamber, ( I have that reamer and the 38-56). The 38-70 and 40-70 were very short lived in the 1886 Winchester.
  

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Re: Correcting sloppy chamber.
Reply #3 - Jul 17th, 2015 at 4:20pm
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John Taylor wrote on Jul 17th, 2015 at 3:48pm:
If the problem is the chamber only and not in the throat then it can be lined and recut. 
The 38-70 would most likely clean up the chamber, ( I have that reamer and the 38-56). The 38-70 and 40-70 were very short lived in the 1886 Winchester.


It's a Ballard Schuetzen rifle.

Lining the chamber would the absolute last thing I would do. 

Have been threatening to shorten the barrel two inches. A little heavy now at sixteen pounds. 38-55 or smaller is the best chamber for the rifle. I have a 38-40R reamer but is to big for the bore. 


        Joe. 


  

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Re: Correcting sloppy chamber.
Reply #4 - Jul 18th, 2015 at 8:14am
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From what I've read, the 38-70, 38-72 and a couple of the longer 40cals in the 1886 & 1895 were short-lived due to the introduction of smokeless powder at about the same time. 

Lining the entire barrel to something like the 35-40 or back to 38-55 would work. But, if JohnT states that he can line only the chamber and make it a shooter I would believe him. He does fine work.
  

Glenn - 2x CPA 44 1/2 w/22LR (Shilen ratchet-rifled & Bartlein 5R rifled), 38-40RH & 38-55WCF (Bartlein 5R rifled) & 40-65WCF (GrnMtn 'X') barrels
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Re: Correcting sloppy chamber.
Reply #5 - Jul 18th, 2015 at 8:42am
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I'm sure he can and so can I.  Lining the chamber and re-chambering would be the absolute last thing I would do to this barrel. 

May never change it. Shoots great the way it is. 

         Joe. 
  

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Re: Correcting sloppy chamber.
Reply #6 - Jul 18th, 2015 at 8:01pm
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westerner wrote on Jul 18th, 2015 at 8:42am:
May never change it. Shoots great the way it is. 

         Joe. 

westerner wrote on Jul 17th, 2015 at 12:20am:
The problem with this Badger barrel is the oversize neck. I'm sure that's why fixed BP loads are just "so so".

         Joe. 

Well................... ? Which is it? Good or bad? Or both? Wink
  

Glenn - 2x CPA 44 1/2 w/22LR (Shilen ratchet-rifled & Bartlein 5R rifled), 38-40RH & 38-55WCF (Bartlein 5R rifled) & 40-65WCF (GrnMtn 'X') barrels
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Re: Correcting sloppy chamber.
Reply #7 - Jul 18th, 2015 at 8:36pm
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Both. 

BP = so so.

Smokeless = excellent.

Iron sighted rifle never used in rare BP BR matches. 

Used mostly for BP OH.   

Sloppy chamber.

Firing pin hits at 12:00. Must use Winchester primers. 

One failed case in approximately 3000 rounds. 

A pain in the ass at times. So far, not enough reasons to fix it. Or........ maybe I should fix it?  I don't know. Maybe one of these days. 

    Joe.
  

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Re: Correcting sloppy chamber.
Reply #8 - Jul 18th, 2015 at 11:05pm
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I have a rifle with a buggered chamber that doesn't shoot fixed ammo well.  It shoots breech seated bullets well.  Sounds like yours.  I would be nice to rebarrel it, but it's also a good excuse to build another rifle.  Smiley

Chris.
  
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Re: Correcting sloppy chamber.
Reply #9 - Jul 19th, 2015 at 9:24am
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Joe - sounds like a few (all?) of my projects, be they rifles or stereo gear or my garden/yard. Life is so short and busy when one is retired.  Wink
  

Glenn - 2x CPA 44 1/2 w/22LR (Shilen ratchet-rifled & Bartlein 5R rifled), 38-40RH & 38-55WCF (Bartlein 5R rifled) & 40-65WCF (GrnMtn 'X') barrels
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Re: Correcting sloppy chamber.
Reply #10 - Jul 20th, 2015 at 1:05am
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Problem rifles/kids, still love um. 

gunlaker

Tell about your problem rifle. What caliber and chamber? Long range, midrange, schuetzen, hunting rifle?

     Joe. 







  

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Re: Correcting sloppy chamber.
Reply #11 - Jul 20th, 2015 at 10:52am
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Joe my problem rifle is a highwall in .38-55.  I bought it from C. Sharps unchambered and had a local gunsmith cut the chamber with a reamer I supplied.  The chamber was cut unbelievably crooked.  You'd have to see it to believe it.  It's probably several degrees off of straight!

The intent was to build a rifle for our black powder offhand shoots that had a crescent buttplate rather than a hooked one.

Before I did a chamber cast I had a heck of a time getting it to shoot well. It was very inconsistent.  After doing the cast I could see why.  Because the chamber is so crooked you can't even breech seat a groove diameter bullet without deforming it.  I got it to shoot quite well by breech seating a bore diameter paper patched bullet ahead of the throat.  It's shot surprisingly well that way so I probably won't mess with it.  Good gunsmiths are in extremely short supply in my neck of the woods.

Chris.
  
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Re: Correcting sloppy chamber.
Reply #12 - Jul 20th, 2015 at 11:01am
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Joe, here is how it shoots at 100m, ten shots with apertures.  It's done a few right ten shot groups around a minute of angle at 200m as well, not every time, but on a good day it's one of my better black powder rifles.

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Chris.
  
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Re: Correcting sloppy chamber.
Reply #13 - Jul 23rd, 2015 at 4:26pm
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Several years back I had a 50 BMG single shot come in with a bad throat. Customer wanted the barrel set back 1/2" and re-chambered. I set the barrel up and started to dial it in and was having trouble. Finally went with a 1/2 " rod and dialed in the bore and discovered the chamber was not lined up to the bore. It's hard to imagine that some one could cut the chamber that far off, like sticking it in a three jaw chuck and having the muzzle end about 1/2" from center.
  

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Re: Correcting sloppy chamber.
Reply #14 - Jul 23rd, 2015 at 6:03pm
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I've found several barrels (and some blanks) where the O.D. was not concentric with the bore at the breech end.  And not by a little!   

  

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