7.92 X 57mm Berdan? - The Firearms Forum

02-24-2003, 08:29 AM

Moskovskyya
Member
Posts: 35
(1/9/02 12:37:57 pm)
Reply | Edit | Del All 7.92 X 57mm Berdan?
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I recently fired some of this ammo. Looking into the case it appears to be boxer primed. Having decaping problems, I cut one of the cases, and it appears to be berdan with a single, centered very small flash hole. The head stamp is (@12:00), 21 RPR, and (@6:00) 55. Any of you guys know what it is?

Thanks

Airedale78 · 12-26-2007, 11:08 PM

Yo, Moskovskyya -

I have an extensive list of headstamp codes from my research for 7.62x51 mil surp. The following was available.
* * * * * * *
21 Mátravidéki Fémmüvek Sirok, Hungary. Normally found on cartridge headstamps with a date stamped right-side up in relation to the factory code
21
Plant 21, Uzinale Metalugica Di Copsa Mica Si Cugir, Romania. Normally found on cartridge headstamps followed by the letters RPR which stand for Republica Popolara Romana (People's Republic of Romania)

21
Zaklady Metalowe MESKO, Skarzysko-Kamienna, Poland. Normally found on cartridge headstamps with a date stamped upside down in relation to the factory code

RPR ("People's Republic of Romania)
* * * * * *

I hope this helps, but I think the brass is only good for the scrap pile since berdan primed ammo is hard to find primers for and kind of touchy to reload without damaging the case head.

Patman1951 · 12-30-2007, 11:16 PM

I'm a little confused by your description. Berdan primed brass has a "post" that stands up in the center of the primer pocket that the primer rests on. So how can it have a center hole? Are you sure that it's just not a boxer primed case that has a smaller/tighter flash hole?
Pat

JLA · 12-31-2007, 03:27 PM

sounds like "pre-standardization" obsolete 8mm mauser surplus ammo... My cartridge conversion sheet lists the 8mm mausers compatibility/interchageabilty cartridges as 7.92X57mm , 7.9 mauser, and simply 8X57 mauser, with the 7.92X57 and the 7.9 mauser being the obsolete nomenclature for the 8X57. so, if you have a box that is stamped 7.92X57mm, it is probably pre WW2 and very very corrosive, and is in the best interest of your firearm to discard, unless you plan on cleaning it right away.

02-24-2003, 08:29 AM	#1
Guest Adnanced Senior Member Posts: n/a	7.92 X 57mm Berdan? Moskovskyya Member Posts: 35 (1/9/02 12:37:57 pm) Reply \| Edit \| Del All 7.92 X 57mm Berdan? -------------------------------------------------------------------------------- I recently fired some of this ammo. Looking into the case it appears to be boxer primed. Having decaping problems, I cut one of the cases, and it appears to be berdan with a single, centered very small flash hole. The head stamp is (@12:00), 21 RPR, and (@6:00) 55. Any of you guys know what it is? Thanks -->

12-26-2007, 11:08 PM	#2
Airedale78 Member Join Date: Dec 2007 Posts: 2	Re: 7.92 X 57mm Berdan? Yo, Moskovskyya - I have an extensive list of headstamp codes from my research for 7.62x51 mil surp. The following was available. * * * * * * * 21 Mátravidéki Fémmüvek Sirok, Hungary. Normally found on cartridge headstamps with a date stamped right-side up in relation to the factory code 21 Plant 21, Uzinale Metalugica Di Copsa Mica Si Cugir, Romania. Normally found on cartridge headstamps followed by the letters RPR which stand for Republica Popolara Romana (People's Republic of Romania) 21 Zaklady Metalowe MESKO, Skarzysko-Kamienna, Poland. Normally found on cartridge headstamps with a date stamped upside down in relation to the factory code RPR ("People's Republic of Romania) * * * * * * I hope this helps, but I think the brass is only good for the scrap pile since berdan primed ammo is hard to find primers for and kind of touchy to reload without damaging the case head.

12-30-2007, 11:16 PM	#3
Patman1951 Member Join Date: Aug 2006 Posts: 14	Re: 7.92 X 57mm Berdan? I'm a little confused by your description. Berdan primed brass has a "post" that stands up in the center of the primer pocket that the primer rests on. So how can it have a center hole? Are you sure that it's just not a boxer primed case that has a smaller/tighter flash hole? Pat

12-31-2007, 03:27 PM	#4
JLA TFF Moderator/Host Join Date: Feb 2007 Location: Heart Of Texas Contributor Posts: 17,308	Re: 7.92 X 57mm Berdan? sounds like "pre-standardization" obsolete 8mm mauser surplus ammo... My cartridge conversion sheet lists the 8mm mausers compatibility/interchageabilty cartridges as 7.92X57mm , 7.9 mauser, and simply 8X57 mauser, with the 7.92X57 and the 7.9 mauser being the obsolete nomenclature for the 8X57. so, if you have a box that is stamped 7.92X57mm, it is probably pre WW2 and very very corrosive, and is in the best interest of your firearm to discard, unless you plan on cleaning it right away. __________________ It takes 43 muscles to frown, 17 to smile, and 3 for proper trigger squeeze. The latest caliber or gear is no substitute for experience and skill. Rifles and cartridges don't make hits -- shooters do. Fact of life: After Monday and Tuesday, even the calendar says WTF!