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Double Rifles, Single Shots & Combinations >> Double Rifles
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Grenadier
.375 member


Reged: 20/02/08
Posts: 570
Loc: North of the Columbia, USA
Re: Proof loads
      27/02/08 12:06 PM

Proof loads? Why bother? You have already exceeded the design pressures for the action you have chosen. SAAMI Maximum pressures for the 12 gauge are 11,500psi and for the .444 Marlin they are 42,000psi. You may have put some stronger barrels in the gun but the action is still a shotgun action. Here is something I posted on another site regarding what you are doing:

"I had a conversation with Paul Jaeger several years ago about making a .375 O/U on a Ruger shotgun. He had done some conversions like that before and chose the Ruger because of the strength of the action. He said he was no longer converting them because of "problems". I asked what the problems were and he went into a discussion centered around the weaknesses of a shotgun action and problems of overworking it. He mentioned double firing. He mentioned setback. He mentioned safety. A well known USA double rifle manufacturer also gained some early notoriety by converting Ruger shotguns to double rifles. You can sometimes find those early guns for sale online, most often in in .444 Marlin or .375H&H. These days, they refuse to do a shotgun conversion - for good reason.

But bold individuals continue to make cheap conversions using ... shotguns as the basis. I wish them good luck and hope they continue to keep all their fingers. After all, anything works until it breaks."

I would think an engineer would have a good grasp of what's going on. I say, if you really must, take it out and shoot it till it either scares you or blows up.

Good luck.

Grenadier

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Entire topic
Subject Posted by Posted on
* Proof loads doublegunfan 18/11/05 07:44 AM
. * * Re: Proof loads Birdhunter50   08/04/16 10:55 PM
. * * Re: Proof loads Birdhunter50   30/05/15 10:38 PM
. * * Re: Proof loads Grenadier   27/02/08 12:06 PM
. * * Re: Proof loads Bramble   29/02/08 04:25 AM
. * * Re: Proof loads 4seventy   21/07/08 05:04 PM
. * * Re: Proof loads Bramble   22/07/08 11:18 AM
. * * Re: Proof loads Tatume   22/07/08 08:49 PM
. * * Re: Proof loads 9.3x57   25/07/08 11:44 AM
. * * Re: Proof loads 450_366   25/07/08 04:00 AM
. * * Re: Proof loads Bramble   23/07/08 06:49 AM
. * * Re: Proof loads Birdhunter50   23/07/08 09:51 AM
. * * Re: Proof loads Grenadier   23/03/08 09:09 AM
. * * Re: Proof loads 450_366   09/06/08 11:09 PM
. * * Re: Proof loads Grenadier   29/02/08 05:43 AM
. * * Re: Proof loads Bramble   29/02/08 08:06 AM
. * * Re: Proof loads Sarg   29/02/08 08:22 AM
. * * Re: Proof loads Marrakai   28/02/08 02:07 PM
. * * Re: Proof loads Grenadier   29/02/08 05:08 AM
. * * Re: Proof loads Sarg   28/02/08 07:51 PM
. * * Re: Proof loads Grenadier   29/02/08 05:14 AM
. * * Re: Proof loads Judson   17/11/05 11:10 AM
. * * Re: Proof loads Tom_Bigbore   18/11/05 12:14 AM
. * * Re: Proof loads 577Robert   23/11/05 08:57 PM
. * * Re: Proof loads doublegunfan   24/11/05 12:48 AM
. * * Re: Proof loads mickey   17/11/05 11:56 AM
. * * Re: Proof loads doublegunfan   17/11/05 09:54 PM
. * * Re: Proof loads banzaibird   17/11/05 11:08 PM
. * * Re: Proof loads iwantadouble   18/11/05 12:36 AM
. * * Re: Proof loads banzaibird   18/11/05 01:03 AM
. * * Re: Proof loads Tom_Bigbore   18/11/05 02:04 AM
. * * Re: Proof loads banzaibird   18/11/05 07:44 AM
. * * Re: Proof loads unspellable   22/11/05 10:43 AM
. * * Re: Proof loads doublegunfan   22/11/05 10:57 PM
. * * Re: Proof loads unspellable   23/11/05 06:10 AM
. * * Re: Proof loads DarylS   23/11/05 10:31 AM
. * * Re: Proof loads hoppdoc   24/03/06 10:33 AM
. * * Re: Proof loads DarylS   26/03/06 04:05 AM
. * * Re: Proof loads hoppdoc   26/03/06 03:02 PM
. * * Re: Proof loads 400NitroExpress   27/08/07 06:38 AM
. * * Re: Proof loads 9.3x57   27/08/07 06:47 AM
. * * Re: Proof loads DarylS   27/03/06 03:11 AM
. * * Re: Proof loads Bramble   12/02/07 06:48 AM
. * * Re: Proof loads 308   12/02/07 02:45 PM
. * * Re: Proof loads Raff   13/02/07 02:38 AM
. * * Re: Proof loads 9.3x57   08/06/07 11:41 PM
. * * Re: Proof loads Marrakai   09/06/07 08:52 AM
. * * Re: Proof loads bonanza   27/08/07 08:37 AM
. * * Re: Proof loads beleg2   02/09/07 01:59 PM
. * * Re: Proof loads 9.3x57   09/06/07 09:37 AM
. * * Re: Proof loads larcher   01/03/07 05:37 AM
. * * Re: Proof loads pistolchamp   29/03/07 05:38 AM
. * * Re: Proof loads Bramble   29/03/07 09:49 AM
. * * Re: Proof loads Peterb   23/11/05 12:13 PM
. * * Re: Proof loads 500Nitro   24/11/05 01:33 AM
. * * Re: Proof loads Peterb   24/11/05 08:58 AM
. * * Re: Proof loads theprof1   07/07/19 02:17 PM
. * * Re: Proof loads crshelton   08/07/19 12:50 AM
. * * Re: Proof loads Wayne59   09/04/16 12:40 AM
. * * Re: Proof loads Kaimiloa   16/04/09 11:50 AM
. * * Re: Proof loads Huvius   16/04/09 01:25 PM
. * * Re: Proof loads Bramble   16/04/09 07:30 PM
. * * Re: Proof loads Huvius   16/04/09 11:09 PM
. * * Re: Proof loads 450_366   16/04/09 07:59 PM
. * * Re: Proof loads 9.3x57   16/04/09 11:18 PM
. * * Re: Proof loads DarylS   17/04/09 12:07 AM
. * * Re: Proof loads KWK   13/07/10 12:32 PM
. * * Re: Proof loads DarylS   14/07/10 12:44 AM
. * * Re: Proof loads KWK   14/07/10 01:26 AM
. * * Re: Proof loads CraigK   21/11/10 06:18 PM
. * * Re: Proof loads beleg2   28/11/10 11:15 PM
. * * Re: Proof loads DoubleRifle999   06/06/12 09:45 AM
. * * Re: Proof loads enfieldspares   25/07/07 05:36 AM
. * * Re: Proof loads Vinnie   18/06/07 09:20 PM
. * * Re: Proof loads Rich   04/08/07 11:56 AM
. * * Re: Proof loads 9.3x57   18/06/07 10:31 PM
. * * Re: Proof loads Vinnie   18/06/07 11:33 PM
. * * Re: Proof loads dnovo   18/06/07 11:22 PM
. * * Re: Proof loads doublegunfan   24/11/05 10:09 PM
. * * Re: Proof loads Peterb   25/11/05 03:48 AM
. * * Re: Proof loads Judson   03/12/05 10:57 AM
. * * Re: Proof loads k80   23/11/05 12:03 PM
. * * Re: Proof loads 500Nitro   22/11/05 11:30 PM
. * * Re: Proof loads mickey   18/11/05 01:58 AM
. * * Re: Proof loads 400NitroExpress   17/11/05 05:26 AM
. * * Re: Proof loads Peterb   17/11/05 04:19 AM
. * * Re: Proof loads foxfire   17/11/05 02:15 AM

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