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#5443504 - 11/25/14 08:39 PM Argentine Mauser Caliber Identification
TCB Offline
Pro Tracker

Registered: 09/01/04
Posts: 1746
Loc: Denton, TX
Need help from the THF experts. My Dad got his hand on this this old Argentine 1891 Mauser but it's not stamped with a caliber. The best we can determine is that it's probably a 7x57 based on a .284 bullet fitting slightly loose in the barrel. It's definitely not a .30 caliber but we're not 100% what it is.

Below are the only markings on the gun.


#5443524 - 11/25/14 08:44 PM Re: Argentine Mauser Caliber Identification [Re: TCB]
kmon1 Online   content

Registered: 09/27/06
Posts: 22651
Loc: Texas
Fitting loosely in the barrel to me says it is not a 7X57. The Argentine mausers I have seen are 7.65 Argentine caliber. But best bet is to have a good gunsmith check it out
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#5443593 - 11/25/14 09:09 PM Re: Argentine Mauser Caliber Identification [Re: TCB]
10ring Offline

Registered: 11/19/12
Posts: 840
Loc: Pilot Point, TX
X2 on 7.65 Argentine also Called 7.65x53.
This would be my guess but certainly having a chamber casting made and getting it checked would be best.
I have a sporterized 1891 Argentine chambered in this caliber and it is a joy to shoot. As for bullet size I reload it with .312 caliber Hornady's

#5446024 - 11/27/14 11:33 AM Re: Argentine Mauser Caliber Identification [Re: TCB]
thedoveshooter Offline
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Registered: 03/02/10
Posts: 1228
Loc: Tomball, TX
It SHOULD be 7.62x53mm. But, many of these were converted to more American calibers. I'd get it checked to be safe. If its full military and no modifications, its probably still its original caliber.
Fightin Texas Aggie Class of 2009


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