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Shooting & Reloading - Mausers, Big Bores and others >> Mannlicher Discussion forum & Archive
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Paul
.400 member


Reged: 28/08/07
Posts: 1031
Loc: Melbourne, Victoria, Australia
Re: 1903 groove diameter
      27/07/12 10:16 PM

Thanks Daryl,
the visible pressure line at the web on .30/06 and 270WSM cases here seemed to start about 1/4" from the back of the rim but the 6.5x54's was 3/8".

Your zero-expansion allowance on the solid head in front of the extraction cannelure makes sense to me according to the ancient advice I was given BUT I find it often in fired factory cases (including the belts of magnums) and even 2 thou on the 270WSM, hence my resolve about reloading them. Is it possible because of less-brittle brass that factories are loading to higher pressures than they use to? I noticed tables on the opposition website where some maximum loads nudged 64,000psi. As I noted there, when I was young that would have been a British proof load, though they may have been CUP figures 50 years ago.

Sorry, I must have read too quick and missed your already saying that 'overpansion' of the web area indicated a large chamber.

- Paul

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Entire topic
Subject Posted by Posted on
* 1903 groove diameter clatrans 21/07/12 06:05 AM
. * * Re: 1903 groove diameter Kiwi_bloke   21/07/12 10:42 AM
. * * Re: 1903 groove diameter DarylS   21/07/12 11:04 AM
. * * Re: 1903 groove diameter MikeRowe   21/07/12 01:05 PM
. * * Re: 1903 groove diameter Paul   21/07/12 05:45 PM
. * * Re: 1903 groove diameter DarylS   22/07/12 01:41 AM
. * * Re: 1903 groove diameter clatrans   24/07/12 05:28 AM
. * * Re: 1903 groove diameter MikeRowe   25/07/12 03:14 AM
. * * Re: 1903 groove diameter clatrans   25/07/12 05:22 AM
. * * Re: 1903 groove diameter DarylS   25/07/12 06:35 AM
. * * Re: 1903 groove diameter clatrans   25/07/12 07:05 AM
. * * Re: 1903 groove diameter DarylS   25/07/12 10:56 AM
. * * Re: 1903 groove diameter Paul   25/07/12 01:48 PM
. * * Re: 1903 groove diameter DarylS   25/07/12 11:49 PM
. * * Re: 1903 groove diameter Paul   27/07/12 10:16 PM
. * * Re: 1903 groove diameter DarylS   27/07/12 11:50 PM
. * * Re: 1903 groove diameter Paul   28/07/12 01:57 PM
. * * Re: 1903 groove diameter DarylS   29/07/12 02:08 AM
. * * Re: 1903 groove diameter Paul   29/07/12 11:24 AM
. * * Re: 1903 groove diameter clatrans   28/07/12 12:46 AM
. * * Re: 1903 groove diameter DarylS   28/07/12 09:32 AM
. * * Re: 1903 groove diameter malco   22/07/12 12:40 AM

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