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

DarylS
.700 member

Reged: 10/08/05
Posts: 26998
Loc: Beautiful British Columbia, Ca...

Re: Small Ring Conversion questions and Chamber Pressure
07/02/10 06:26 AM

You can always reduce bolt thrust, ie: pressure on the bolt, by going to an Improved ctg. design. The straighter the case walls, the less the breech pressure.

The 9.3x62 has very close to an 'improved' case design, ie: minimal taper. It's design was way ahead of it's time.
Check out the something like .474" head diameter (mine is .472" - only .002" larger than sammi standard for the '06 etc.) Check out the .454" shoulder, same as most Improved cases on the .470" head cases.

The 9.3x62 has identical capacity as my .375/06IMP that is cut oversize for normal - .472" head, and .460 shoulder. Both have a 78gr. capacity.

The Improved cases are the safest for loading in any action of questionable strength. The .308 family of ctg. follow this basic improved design of minimal taper as well, but have shorter bodies, which stick less well than longer ones in the chamber during pressure peaks.

Ctgs. of greater taper, like the .416 Rigby show pressure signs of bolt thrust/sticking long before better designed, straighter brass does, as the sloping case is less able to grip the chamber walls until pressure subsides, therefore they have and are only capable of lower working pressure limits.

--------------------
Daryl

"a gun without hammers is like a Spaniel without ears" King George V

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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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