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Very Hot Topic (More than 25 Replies) Winchester patent chamber insert (Read 13614 times)
shoothog
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Winchester patent chamber insert
Mar 9th, 2017 at 3:19pm
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I found this among some 32-40 brass. Thought it was a nickel case until further investigation.

  
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shoothog
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Re: Winchester patent chamber insert
Reply #1 - Mar 9th, 2017 at 3:25pm
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Other side
  
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Schuetzenmiester
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Re: Winchester patent chamber insert
Reply #2 - Mar 9th, 2017 at 3:34pm
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What are they used for? Go no go gauge?
  

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rodneys
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Re: Winchester patent chamber insert
Reply #3 - Mar 9th, 2017 at 3:50pm
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Is that a sub caliber adapter so you can shoot a pistol cartridge in a rifle?
  
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waterman
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Re: Winchester patent chamber insert
Reply #4 - Mar 9th, 2017 at 3:51pm
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The idea was to be able to use low powered revolver cartridges in your center-fire rifle for practice, plinking, etc.  They were made in several .30 and .32 calibers.

Ken Waters did a rather detailed article on them.  It is in his Pet Loads book.
  
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BP
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Re: Winchester patent chamber insert
Reply #5 - Mar 9th, 2017 at 4:07pm
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Those were called the "Winchester Supplemental Chamber".
The 32-40 and 32 Win Special used the 32 Colt cartridges.
The 30 WCF, 30 ARMY (Krag), 30 Gov't 1906, 303 Savage and 303 British used the currently more readily avaikable 32 S&W cartridge.
The 405 used the 41 Short Colt.
Have two originals for the 30 WCF, and once asked Rocky Mountain if they could make up some of the others, but they said Nope.
  

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calledflyer
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Re: Winchester patent chamber insert
Reply #6 - Mar 9th, 2017 at 5:13pm
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I have a supplemental chamber for my .30 US that uses rimfire blanks and .30 cal lead bullets that you finger seat to shoot. I tried a few and found them reliable, but not so accurate in my ol' highwall. I have one of the Winchester versions but never tried it out.
  
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Jeff_Schultz
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Re: Winchester patent chamber insert
Reply #7 - Mar 9th, 2017 at 5:31pm
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  Well, that's quite a find! I'll bet it's worth more than the rest of the brass, unless we're talking about bushels of 32-40 brass. Grin
  They must have been woefuly inaccurate, the Colt cartridge using a .313 bullet. Good enough for a slaughterhouse though.
  

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JLouis
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Re: Winchester patent chamber insert
Reply #8 - Mar 9th, 2017 at 6:11pm
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Jeff that is what had me wondering as well and that being how would a .312 bullet work in the 32-40's .312 bore diameter. Mann has stated on occasion that bore diamter bullets proved to be more accurate than groove so it makes me wonder how well the Long Colt bullets actualy shot? Then again I don't understand fully how the case adapter actually worked so could someone please explain the entire process of it's actual use.
  

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BP
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Re: Winchester patent chamber insert
Reply #9 - Mar 9th, 2017 at 6:16pm
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Jeff and John,
Which 32 CF Colt's are you thinking of, the outside lubed versions, or the inside lubed versions?
If the bullet hit qtr-minute of bunny, grouse, etc, they were accurate enough for their intended purpose.    Cheesy
  

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Re: Winchester patent chamber insert
Reply #10 - Mar 9th, 2017 at 6:46pm
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I also understand Marbles made them as well. I believe I saw a display on them at a collectors show many years ago and thought it was an interesting idea.

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BP
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Re: Winchester patent chamber insert
Reply #11 - Mar 9th, 2017 at 6:56pm
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I've seen the Marbles versions, but seem to recall them being designed differently with the cartridge being towards the front of the adapter, so your firearm's firing pin struck a transfer pin which then struck the primer of the cartridge.
Winchester positioned the cartridge at the rear of their supplemental chambers, so the firearm's firing pin struck the primer of the cartridge directly, and there wasn't any tranfer pin to get lost somewhere in the brush.
« Last Edit: Mar 9th, 2017 at 7:02pm by BP »  

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Redsetter
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Re: Winchester patent chamber insert
Reply #12 - Mar 9th, 2017 at 7:24pm
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BP wrote on Mar 9th, 2017 at 6:56pm:
...there wasn't any tranfer pin to get lost somewhere in the brush.


Not likely--it's retained by a screw.  Never had one (though I've always wanted to try one out), but there's a cross-sectional drawing in my 1905 Marble's catalog.  It's actually called "Brayton's Auxiliary Cartridge."

By positioning the bullet at or near the origin of the rifling, accuracy ought to be better than with the other design, though probably not great in either case.  But not much was expected, as the idea was to use them for pot-shooting small game while hunting big game, like fool-hens perched on a limb a few yards away.


  
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Re: Winchester patent chamber insert
Reply #13 - Mar 9th, 2017 at 7:44pm
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BP wrote on Mar 9th, 2017 at 6:16pm:
Jeff and John,
Which 32 CF Colt's are you thinking of, the outside lubed versions, or the inside lubed versions?
If the bullet hit qtr-minute of bunny, grouse, etc, they were accurate enough for their intended purpose.    Cheesy

  What's the difference?
  

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BP
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Re: Winchester patent chamber insert
Reply #14 - Mar 9th, 2017 at 7:50pm
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Bullet diameters and base cavities?
  

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