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DarylS
.700 member


Reged: 10/08/05
Posts: 27731
Loc: Beautiful British Columbia, Ca...
Re: Mauser 71/84....Some information.
      16/07/12 02:06 AM

The Model 71/76 superseeded the Model 71/84. In the 71/76, the bore diameter was normal at .437", however the groove diameter was .457" - supposedly to better collect the fouling for longer shooting strings before military accuracy was comprimized. The bullet was a paper patched ,446" bullet, a full .011" smaller than the groove diameter.

Due to being a soft, paper patched bullet loaded with the 77gr. black powder charge, the bullet would obturate to fill the rifling when fired and accuracy was pretty good- for a while. The chamber's neck dimaeter would not allow seating a bullet larger than the normal .446", hense in later years ie: 1900's through to about 1960 in Canada, when CIL/Dominion produced this amo for the civilian market with a paper patched bullet and smokeless powder, the accuracy was horrid - in the earlier rifles. This was because smokeless powder does not hit the base of the bullet quickly enough, too soft a blow, to cause obturation. Thus, the bullet's paper coating would be burnt off in it's trip down the bore and accuracy was horrid.

The model of 71/84, actually had a much better bore- size/wise wit it's .446" groove diameter and this rifle model shot the much later smokeless ammo quite well, usually into 3" at 100 meters with the rifle's issue sights - which were quite good as far as early sights go.

This pictured rifle is a 71/76 9with new ramp front sight installed due to the original being missing.

At the time I was given this rifle, I couldn't obtain Starline brass for it and due to the chamber neck's limitations as to bullet size, I rechambered it for the .450 Alaskan by grinding down the pilot to .437" to fit the bore. It's a great handling little carbine and shoots well due to the 20" twist rate. It's light at only 6 pounds and the 500gr. cast bullets at 1,320fps do kick a bit (BP load). It easily handles smokeless loads with those same 500's running 1,500fps. It's a thunper.
For a gun in good condition with collector value, I'd not suggest this move, except for another 71/76 which wanted to go hunting. In that case, a simply neck/throater to open up the neck would suffice. Brass is available today in the original 11 mm Mauser.









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


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

Edited by CptCurl (12/11/12 02:49 AM)

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Entire topic
Subject Posted by Posted on
* Mauser 71/84....Some information. vegard_dino 15/07/12 06:39 AM
. * * Re: Mauser 71/84....Some information. vegard_dino   15/07/12 04:22 PM
. * * Re: Mauser 71/84....Some information. kuduae   15/07/12 05:55 PM
. * * Re: Mauser 71/84....Some information. vegard_dino   16/07/12 01:32 AM
. * * Re: Mauser 71/84....Some information. DarylS   16/07/12 02:06 AM
. * * Re: Mauser 71/84....Some information. vegard_dino   16/07/12 06:56 AM
. * * Re: Mauser 71/84....Some information. DarylS   17/07/12 01:10 AM
. * * Re: Mauser 71/84....Some information. vegard_dino   24/07/12 03:54 AM
. * * Re: Mauser 71/84....Some information. Rolf   26/07/12 08:25 PM
. * * Re: Mauser 71/84....Some information. lancaster   28/07/12 10:22 PM
. * * Re: Mauser 71/84....Some information. DarylS   29/07/12 01:20 AM
. * * Re: Mauser 71/84....Some information. Paul   29/07/12 01:29 PM
. * * Re: Mauser 71/84....Some information. DarylS   30/07/12 02:26 AM
. * * Re: Mauser 71/84....Some information. John303   01/01/13 01:14 PM
. * * Re: Mauser 71/84....Some information. DarylS   02/01/13 06:15 AM
. * * Re: Mauser 71/84....Some information. John303   02/01/13 07:15 AM
. * * Re: Mauser 71/84....Some information. DarylS   02/01/13 10:17 AM
. * * Re: Mauser 71/84....Some information. DarylS   27/07/12 01:25 AM

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