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Double Rifles, Single Shots & Combinations >> Building Double Rifles & Gunsmithing
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Birdhunter50
.375 member


Reged: 03/06/07
Posts: 815
Loc: Iowa,U.S.A.
Re: My 45-100 project
      10/07/08 11:20 PM

One of the things that make the 45-70 somewhat touchier to chamber is that there is some variation in rim thickness between various maker of brass and even in some of the same lot at times. I just took a randum sampling from my range box and came up with an over all difference in rim thinkness of .005 between several rounds. For final sight ins and for hunting, I use nothing but newer Remington or Federal cases and they both have the thicker rims. When you do the headspacing, you have to take into account the thickest rims you will encounter. I don't know how closely your brass is manufactured, but it might pay you to measure a few rims. Have you tried trimming them back to original length and then re-firing and re-measuring a few of them to see if the streching continues? Brass work hardens as it is fired and resized, (that may help some, I'm not sure of this though),if it doesn't, you may have to set the barrels back .006 or so. Bob H.

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Entire topic
Subject Posted by Posted on
* My 45-100 project xsheadspace 09/07/08 11:28 PM
. * * Re: My 45-100 project SharpsNitro   12/08/08 02:30 PM
. * * Re: My 45-100 project DarylS   13/08/08 01:15 AM
. * * Re: My 45-100 project SharpsNitro   13/08/08 10:50 AM
. * * Re: My 45-100 project DarylS   14/08/08 12:22 AM
. * * Re: My 45-100 project xsheadspace   19/08/08 04:35 AM
. * * Re: My 45-100 project Sarg   19/08/08 06:03 AM
. * * Re: My 45-100 project DarylS   20/08/08 04:32 AM
. * * Re: My 45-100 project xausa   13/08/08 01:14 AM
. * * Re: My 45-100 project Birdhunter50   03/08/08 10:51 AM
. * * Re: My 45-100 project Birdhunter50   10/07/08 11:20 PM
. * * Re: My 45-100 project xsheadspace   11/07/08 07:31 AM
. * * Re: My 45-100 project Birdhunter50   24/07/08 09:31 PM
. * * Re: My 45-100 project DarylS   24/07/08 11:11 PM
. * * Re: My 45-100 project xsheadspace   25/07/08 08:41 AM
. * * Re: My 45-100 project xausa   29/07/08 02:21 AM
. * * Re: My 45-100 project xsheadspace   03/08/08 01:52 AM
. * * Re: My 45-100 project DarylS   03/08/08 02:32 AM
. * * Re: My 45-100 project 450_366   27/07/08 02:09 AM
. * * Re: My 45-100 project xsheadspace   28/07/08 11:38 PM
. * * Re: My 45-100 project DarylS   29/07/08 01:41 AM
. * * Re: My 45-100 project tinker   25/07/08 10:32 AM
. * * Re: My 45-100 project Birdhunter50   10/07/08 08:53 AM
. * * Re: My 45-100 project Birdhunter50   10/07/08 08:57 AM
. * * Re: My 45-100 project Marrakai   10/07/08 01:13 PM
. * * Re: My 45-100 project dale   10/07/08 02:59 PM
. * * Re: My 45-100 project DarylS   10/07/08 09:53 PM
. * * Re: My 45-100 project tinker   10/07/08 04:30 AM

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