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baileybradshaw
.333 member


Reged: 21/06/08
Posts: 305
Loc: Diana, TX
Re: New Farquharson action
      25/03/10 09:32 AM

As for the largest cartridge it can be chambered for. I designed it for 30-06 sized cases, but since it requires a rimmed case, it will need to be a rimmed version in the medium bore family.

I did some research regarding the specific strength of the action. The dimensions critical to this are the action side walls, barrel band and corresponding barrel shank dia. The side walls are .2" thick, but can be left thicker if requested. ( the action is 1.25" thick)That's the same side wall thickness as a Ruger no.1, but my action has a couple of advantages over the no 1. First is the material. The No 1 is from a casting, and has releived areas where the sidewalls are thinner. I am using 4140 and 8620, and the cavity is wire cut on my EDM. The EDM produces a smooth, stress free cut. The breech block, also EDM cut is a precise fit, which reduces "hammering" from a not so perfect fit.

The barrel hole on the action is .875", which keeps .2" barrel wall thickness, plus the thickness of the barrel band around the chamber ( .164"). So, the dimensions of the barrel band and barrel shank require the case diameter to be .471" and smaller at the base, The rimm size should be .531" and smaller. This includes the 9.3x74r. So, to answer the question on the largest caliber, the 9.3X74R would be it.

--------------------
www.bradshawgunandrifle.com

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Entire topic
Subject Posted by Posted on
* New Farquharson action baileybradshaw 15/01/10 03:47 PM
. * * Re: New Farquharson action mehulkamdar   16/01/10 11:55 AM
. * * Re: New Farquharson action Anonymous   16/01/10 04:54 PM
. * * Re: New Farquharson action Cinghiale   16/01/10 05:55 PM
. * * Re: New Farquharson action CptCurlAdministrator   17/01/10 12:24 AM
. * * Re: New Farquharson action baileybradshaw   17/01/10 02:44 AM
. * * Re: New Farquharson action NitroXAdministrator   17/01/10 02:51 AM
. * * Re: New Farquharson action Squarebridge   17/01/10 04:38 AM
. * * Re: New Farquharson action Antlers   17/01/10 11:33 AM
. * * Re: New Farquharson action Englishman   18/01/10 04:04 AM
. * * Re: New Farquharson action CptCurlAdministrator   19/01/10 12:35 AM
. * * Re: New Farquharson action baileybradshaw   19/01/10 01:21 PM
. * * Re: New Farquharson action AkMike   19/01/10 04:04 PM
. * * Re: New Farquharson action baileybradshaw   20/01/10 12:30 AM
. * * Re: New Farquharson action AkMike   20/01/10 05:59 AM
. * * Re: New Farquharson action AiredaleMarine   09/07/10 11:45 AM
. * * Re: New Farquharson action Orvar   20/01/10 07:02 AM
. * * Re: New Farquharson action baileybradshaw   20/01/10 07:25 AM
. * * Re: New Farquharson action baileybradshaw   21/01/10 08:37 AM
. * * Re: New Farquharson action Carpetsahib   24/01/10 03:25 AM
. * * Re: New Farquharson action baileybradshaw   24/01/10 11:37 AM
. * * Re: New Farquharson action baileybradshaw   31/01/10 04:42 AM
. * * Re: New Farquharson action Cinghiale   31/01/10 06:13 PM
. * * Re: New Farquharson action Carpetsahib   01/02/10 12:48 AM
. * * Re: New Farquharson action baileybradshaw   01/02/10 03:11 PM
. * * Re: New Farquharson action baileybradshaw   04/02/10 09:54 AM
. * * Re: New Farquharson action CHAPUISARMES   04/02/10 10:08 AM
. * * Re: New Farquharson action Kalunga   04/02/10 10:13 AM
. * * Re: New Farquharson action BlainSmipy   25/02/10 03:42 AM
. * * Re: New Farquharson action baileybradshaw   26/02/10 02:04 AM
. * * Re: New Farquharson action baileybradshaw   18/03/10 01:32 PM
. * * Re: New Farquharson action baileybradshaw   20/03/10 01:51 PM
. * * Re: New Farquharson action DarylS   21/03/10 01:51 AM
. * * Re: New Farquharson action Old_Glass   21/03/10 03:56 AM
. * * Re: New Farquharson action baileybradshaw   23/03/10 01:10 PM
. * * Re: New Farquharson action CHAPUISARMES   23/03/10 02:32 PM
. * * Re: New Farquharson action 450_366   23/03/10 05:58 PM
. * * Re: New Farquharson action kamilaroi   23/03/10 10:16 PM
. * * Re: New Farquharson action baileybradshaw   25/03/10 09:32 AM
. * * Re: New Farquharson action mehulkamdar   26/03/10 11:30 AM
. * * Re: New Farquharson action Rockdoc   26/03/10 12:34 PM
. * * Re: New Farquharson action baileybradshaw   28/03/10 02:28 AM
. * * Re: New Farquharson action Rockdoc   28/03/10 09:57 PM
. * * Re: New Farquharson action baileybradshaw   10/04/10 10:43 AM
. * * Re: New Farquharson action baileybradshaw   26/04/10 11:58 AM
. * * Re: New Farquharson action Rule303   26/04/10 12:36 PM
. * * Re: New Farquharson action baileybradshaw   30/04/10 04:21 AM
. * * Re: New Farquharson action baileybradshaw   16/06/10 12:07 PM
. * * Re: New Farquharson action baileybradshaw   22/06/10 03:08 AM
. * * Re: New Farquharson action NitroXAdministrator   09/08/10 01:26 AM
. * * Re: New Farquharson action DarylS   10/08/10 01:28 AM
. * * Re: New Farquharson action Mike_Bailey   22/06/10 08:06 AM
. * * Re: New Farquharson action CHAPUISARMES   22/06/10 08:57 AM
. * * Re: New Farquharson action Dono   08/08/10 05:28 PM
. * * Re: New Farquharson action baileybradshaw   22/06/10 09:22 AM
. * * Re: New Farquharson action CptCurlAdministrator   22/06/10 09:45 AM
. * * Re: New Farquharson action baileybradshaw   22/06/10 10:22 AM
. * * Re: New Farquharson action Charls   23/06/10 10:30 PM
. * * Re: New Farquharson action baileybradshaw   18/01/10 11:45 AM
. * * Re: New Farquharson action casper50   15/01/10 09:15 PM
. * * Re: New Farquharson action rigbymauser   15/01/10 11:47 PM
. * * Re: New Farquharson action 500Nitro   15/01/10 11:49 PM
. * * Re: New Farquharson action CptCurlAdministrator   16/01/10 12:24 AM
. * * Re: New Farquharson action baileybradshaw   16/01/10 02:41 AM
. * * Re: New Farquharson action 450_366   16/01/10 03:21 AM
. * * Re: New Farquharson action AkMike   16/01/10 04:43 AM
. * * Re: New Farquharson action baileybradshaw   16/01/10 07:06 AM
. * * Re: New Farquharson action degoins   16/01/10 10:55 AM

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