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Shooting & Reloading - Mausers, Big Bores and others >> Muzzleloaders & Blackpowder
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DarylSModerator
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Re: goex powder cartridge data
      28/04/23 07:41 AM

I read an article somewhere, about using IMR3031 as the duplex smokeless loading.
I tried that in my .50/70, 1859 barrel, lined and chambered in 1867 under contract with Sharps and the US Gvt. for the model 1868 Sharps rifle.
I put this barrel on my Italian cast 4140 action way back in the early 80's and tested it with straight and duplex loading.
With 10gr. of 3031 and 55gr. of 1F black powder, I achieved 3", 5-shot groups at 100 yards, along with the normal clean burning of the duplex load. IIRC, the best accuracy I got with straight black powder was 5 to 6".
The article's reasoning using IMR3031, was reduced pressure compared to using a faster smokeless powder like 4759, the then champion of duplex loading.
Too, using 3031 did everything the faster powders did, and shot just as well.
As a lower pressure smokeless, it's worth a try if that is a consideration. 10gr. was suggested for a 70gr. case. The .43 Mauser is a 77gr. capacity case, iirc.

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Subject Posted by Posted on
* goex powder cartridge data lancaster 19/04/23 12:02 AM
. * * Re: goex powder cartridge data Longknife   21/04/23 01:19 AM
. * * Re: goex powder cartridge data Marrakai   21/04/23 07:48 AM
. * * Re: goex powder cartridge data 85lc   22/04/23 01:37 AM
. * * Re: goex powder cartridge data DarylSModerator   22/04/23 01:58 AM
. * * Re: goex powder cartridge data sharps4590   24/04/23 05:56 AM
. * * Re: goex powder cartridge data 85lc   24/04/23 09:57 AM
. * * Re: goex powder cartridge data sharps4590   25/04/23 08:55 PM
. * * Re: goex powder cartridge data 85lc   26/04/23 12:08 AM
. * * Re: goex powder cartridge data sharps4590   26/04/23 09:06 PM
. * * Re: goex powder cartridge data 85lc   27/04/23 01:17 AM
. * * Re: goex powder cartridge data sharps4590   27/04/23 09:51 PM
. * * Re: goex powder cartridge data 85lc   28/04/23 07:13 AM
. * * Re: goex powder cartridge data DarylSModerator   28/04/23 07:41 AM
. * * Re: goex powder cartridge data sharps4590   28/04/23 09:51 PM
. * * Re: goex powder cartridge data DarylSModerator   29/04/23 01:55 AM
. * * Re: goex powder cartridge data 85lc   29/04/23 03:12 AM
. * * Re: goex powder cartridge data 85lc   29/04/23 04:16 AM
. * * Re: goex powder cartridge data DarylSModerator   29/04/23 06:56 AM
. * * Re: goex powder cartridge data sharps4590   29/04/23 09:11 PM
. * * Re: goex powder cartridge data DarylSModerator   30/04/23 01:31 AM
. * * Re: goex powder cartridge data 85lc   30/04/23 02:04 AM
. * * Re: goex powder cartridge data sharps4590   30/04/23 08:54 AM

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