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

DarylS
.700 member

Reged: 10/08/05
Posts: 27732
Loc: Beautiful British Columbia, Ca...

Re: 71-84, .43 cal., Mauser
21/03/13 03:12 AM

Here's mine, a 71/76 - earlier version with a .457/.458" groove diameter, not .446" as in the M71/84 model. The deeper grooves were thought to help with longer shooting strings, in holding powder fouling from the .43 Mauser's 77gr. charge yet getting a good grip on the paper patched 370gr. soft bullet that would expand into the grooves, filling whatever room was available.
Unfortunately for shooters today having this model, who don't want to put up with mediocre accuracy of the over expanded (up to .011") paper patched bullet, the chamber will accept no larger a bullet than a .446" bullet. The bore diameter is nominally .437/.438". In the model 71/76, such as my carbine, the depth of rifling runs .010" to .0105" per side.
The alternatives for someone wanting to shoot this model are to either put up with the accuracy of the groosly undersized bullet, or to open up the chamber's neck to allow a larger bullet, ie; one of groove diameter.
Since at the time I acquired my rifle, .43 Mauser brass was not available to me, I simply re-chambered my rifle to the .450 Alaskan, with the pilot turned down to .437".
The results with a .45/70-type load of smokeless and with black powder are equally satisfying, even though the bore is in poor shape. Fire lapping helped immensely.
At 6 pounds, it boots quite smartly.

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

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

Edited by CptCurl (07/06/13 09:59 PM)

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Subject	Posted by	Posted on
71-84, .43 cal., Mauser	John303	18/03/13 09:14 AM
Re: 71-84, .43 cal., Mauser	lancaster	19/03/13 05:38 AM
Re: 71-84, .43 cal., Mauser	lancaster	20/03/13 05:21 AM
Re: 71-84, .43 cal., Mauser	9.3x57	20/03/13 06:08 AM
Re: 71-84, .43 cal., Mauser	lancaster	20/03/13 06:33 AM
Re: 71-84, .43 cal., Mauser	DarylS	21/03/13 03:12 AM
Re: 71-84, .43 cal., Mauser	DarylS	21/03/13 03:29 AM
Re: 71-84, .43 cal., Mauser	DORLEAC	31/03/13 07:40 PM
Re: 71-84, .43 cal., Mauser	Iowa_303s	01/04/13 12:15 AM
Re: 71-84, .43 cal., Mauser	lancaster	01/04/13 12:24 AM
Re: 71-84, .43 cal., Mauser	DORLEAC	01/04/13 12:48 AM
Re: 71-84, .43 cal., Mauser	John303	04/04/13 01:08 AM
Re: 71-84, .43 cal., Mauser	DarylS	04/04/13 01:18 AM
Re: 71-84, .43 cal., Mauser	John303	04/04/13 12:55 PM
Re: 71-84, .43 cal., Mauser	DarylS	05/04/13 03:28 AM
Re: 71-84, .43 cal., Mauser	DarylS	05/04/13 12:12 PM
Re: 71-84, .43 cal., Mauser	John303	06/04/13 02:21 AM
Re: 71-84, .43 cal., Mauser	DarylS	06/04/13 02:33 AM
Re: 71-84, .43 cal., Mauser	John303	28/04/13 03:07 AM
Re: 71-84, .43 cal., Mauser	John303	14/11/13 10:16 AM
Re: 71-84, .43 cal., Mauser	Ash	14/11/13 05:56 PM

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