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Double Rifles, Single Shots & Combinations >> Single Shots & Combination Guns
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KWK
.275 member


Reged: 28/02/04
Posts: 61
Loc: Illinois
Re: 375 MAG FL NE on MH
      10/07/04 04:09 PM

I'm not too familiar with the strength of the various Martini actions, but the pressure with the .375 Fl. Mag. is much lower than most people think.

The CIP rates it at the same pressure as the .30-40 and thus below the .303 Brit. Using CIP tables and assuming the "piston area" can be taken from the O.D. of the case, the .375 gives only about 10% more thrust than the .303.

The Flanged version is a slightly longer cartridge leaving more powder room, and it was spec'd at a lower fps despite being spec'd with the longer barrels often found with doubles and singles. These add up to much lower pressure. The Flanged is rated at 41,000 as indicated by CIP's crushers, and the Belted is at 54,000. (CIP crusher ratings typ. run about 1000 above SAAMI CUP.)


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Entire topic
Subject Posted by Posted on
* 375 MAG FL NE on MH DoubleD 29/01/04 05:14 PM
. * * original pressures bpesteve   23/07/04 09:55 AM
. * * Re: original pressures of .375 Fl Mag NE DoubleD   25/07/04 06:39 AM
. * * Re: 375 MAG FL NE on MH Levallois   31/01/04 02:24 AM
. * * Re: 375 MAG FL NE on MH DoubleD   06/07/04 07:44 AM
. * * Re: 375 MAG FL NE on MH 470Rigby   06/07/04 08:52 AM
. * * Re: 375 MAG FL NE on MH KWK   10/07/04 04:09 PM
. * * Re: 375 MAG FL NE on MH 470Rigby   11/07/04 10:42 AM
. * * Re: 375 MAG FL NE on MH KWK   11/07/04 03:50 PM
. * * Re: 375 MAG FL NE on MH KWK   11/07/04 04:38 PM
. * * Re: 375 MAG FL NE on MH NitroXAdministrator   11/07/04 07:04 PM
. * * Re: 375 MAG FL NE on MH DoubleD   11/07/04 09:46 PM
. * * Re: 375 MAG FL NE on MH KWK   12/07/04 03:05 AM
. * * Re: 375 MAG FL NE on MH DoubleD   06/07/04 09:15 AM

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