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Shooting & Reloading - Mausers, Big Bores and others >> Mauser Discussion Forum

kuduae
.400 member

Reged: 13/01/10
Posts: 1792
Loc: middle of Germany

Re: Small Ring Conversion questions_1
06/02/10 11:15 AM

A little bit of basic physics: A cartridge case contains pressure. Said pressure works against the action's breech only by the base area of the cartridge case. The case works like a piston against the breech. A bigger diameter case, having a larger base area, exerts more strain on the breech at the same pressure. The length of the case or the diameter or weight of the bullet has no relevance here, as it is contained by the barrel. As the 7x57, the 8x57IS and the 9.3x62 share about the same base diameter and the same allowable pressure of 3400 bar according to international CIP rules, so they put the same strain on the action. The 9.3x64 has a max allowable working pressure of 3800bar working on a much larger base area, so it puts a much higher load on the breech. The pressure is only increased by about 10%, but it works against a much larger base area too, so the load it puts on the action is increased by about 25%. Another example: The .223 Rem has a pressure of 3700bar, the .416 Rigby only 2850bar, but the Rigby has several times the base area that makes the pressure work against the breech, so the load applied by the Rigby case is much higher than that of the .223.
This is the reason why I would put the 9.3x62 in any action suitable for the 7x57 or 8x57IS, but not cartridges of higher pressure and/or larger base diameters. Otto Bock designed the 9.3x62 this way in 1905!

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Subject	Posted by	Posted on
Small Ring Conversion questions_1	Sauercollector	04/02/10 07:16 AM
Re: Small Ring Conversion questions_1	Sauercollector	11/02/10 12:10 PM
Re: Small Ring Conversion questions_1	dons	11/02/10 12:57 PM
Re: Small Ring Conversion questions_1	mauserand9mm	11/02/10 01:34 PM
Re: Small Ring Conversion questions_1	dons	05/02/10 12:07 AM
Re: Small Ring Conversion questions_1	kuduae	05/02/10 09:13 AM
Re: Small Ring Conversion questions_1	Altamaha	06/02/10 07:51 AM
Re: Small Ring Conversion questions_1	kuduae	06/02/10 08:21 AM
Re: Small Ring Conversion questions_1	Altamaha	06/02/10 08:36 AM
Re: Small Ring Conversion questions_1	tophet1	06/02/10 09:51 AM
Re: Small Ring Conversion questions_1	kuduae	06/02/10 11:15 AM
Re: Small Ring Conversion questions and Chamber Pressure	Altamaha	07/02/10 01:34 AM
Re: Small Ring Conversion questions and Chamber Pressure	Grenadier	07/02/10 01:48 AM
Re: Small Ring Conversion questions and Chamber Pressure	Altamaha	07/02/10 03:13 AM
Re: Small Ring Conversion questions and Chamber Pressure	DarylS	07/02/10 06:26 AM
Re: Small Ring Conversion questions and Chamber Pressure	Altamaha	07/02/10 06:50 AM
Re: Small Ring Conversion questions and Chamber Pressure	kuduae	08/02/10 03:23 AM
Re: Small Ring Conversion questions and Chamber Pressure	DarylS	12/02/10 02:36 AM
Re: Small Ring Conversion questions and Chamber Pressure	kuduae	12/02/10 03:38 AM
Re: Small Ring Conversion questions and Chamber Pressure	dons	12/02/10 08:38 AM
Re: Small Ring Conversion questions and Chamber Pressure	kuduae	12/02/10 10:00 AM
Re: Small Ring Conversion questions and Chamber Pressure	kuduae	12/02/10 10:24 AM
Re: Small Ring Conversion questions and Chamber Pressure	Sauercollector	12/02/10 07:58 PM
Re: Small Ring Conversion questions and Chamber Pressure	kuduae	13/02/10 12:33 AM
Re: Small Ring Conversion questions and Chamber Pressure	450_366	12/02/10 04:18 AM
Re: Small Ring Conversion and Stock Pentagraph service?	Sauercollector	03/03/10 06:58 AM
Re: Small Ring Conversion questions and Chamber Pressure	Sauercollector	13/02/10 04:57 AM
Re: Small Ring Conversion questions and Chamber Pressure	kuduae	13/02/10 08:29 AM
Re: Small Ring Conversion questions and Chamber Pressure	dons	13/02/10 01:22 PM
Re: Small Ring Conversion questions and Chamber Pressure	kuduae	13/02/10 09:06 PM
Re: Small Ring Conversion questions and Chamber Pressure	lancaster	14/02/10 01:18 AM
Re: Small Ring Conversion questions and Chamber Pressure	dons	14/02/10 07:33 AM
Re: Small Ring Conversion questions and Chamber Pressure	lancaster	14/02/10 07:46 AM
Re: Small Ring Conversion questions and Chamber Pressure	kuduae	14/02/10 10:54 PM
Re: Small Ring Conversion questions and Chamber Pressure	kuduae	12/02/10 05:13 AM
Re: Small Ring Conversion questions and Chamber Pressure	Sauercollector	08/02/10 06:34 AM
Re: Small Ring Conversion questions and Chamber Pressure	tophet1	08/02/10 07:36 AM
Re: Small Ring Conversion questions and Chamber Pressure	kuduae	08/02/10 08:22 AM
Re: Small Ring Conversion questions and Chamber Pressure	Sauercollector	09/02/10 05:32 AM
Re: Small Ring Conversion questions_1	Bramble	04/02/10 11:36 AM

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