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Shooting & Reloading - Mausers, Big Bores and others >> Rifles
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NitroXAdministrator
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8x75 mm RS
      #18057 - 17/08/04 02:40 AM

Has anyone got any information on the 8x75 mm RS cartridge?



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John aka NitroX

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Safarischorsch
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Reged: 28/02/04
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Re: 8x75 mm RS [Re: NitroX]
      #18136 - 18/08/04 05:15 PM

Well an old cartridge which was used in many guns many years ago. It was told that it was the favorite cartridge of Hermann Göring. This cartridge is not easy to handle when you reload it and is by far not as powerfull as the 8x68S. Brass are expensive ammunition is extreme expensive and only few bullets are offered. When you reload it is ok. If i need a rimmed cartridge in this size i would choose the 7x65R Brenneke, the 8,5x63 R Reb or the .30 R Blaser.

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DPhillips
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Re: 8x75 mm RS [Re: NitroX]
      #18166 - 19/08/04 05:56 AM

Nitro,
I've made a few inquiries about the 7x75R. Saw a break action single shot at the SCI show this year made by Philipp Oliendorff. The rifle was outstanding but I didn't know much about the cartridge. I learned it is the Vom Hoffe cartridge, and suspect it can be made by necking 9x74R brass down to 7mm. Sounds interesting, but not sure what performance would be gained over something like the 7x65 or necking down the 8x68 to 7mm.

Here's a picture of the rifle

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NitroXAdministrator
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Re: 8x75 mm RS [Re: DPhillips]
      #53408 - 28/03/06 01:20 AM

Does anyone have what typical ballistics can be obtained from a 8x75RS?

Also what is the usual bullet weight? 200 grains ?



--------------------
John aka NitroX

...
Govt get out of our lives NOW!
"I love the smell of cordite in the morning."
"A Sharp spear needs no polish"

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Yochanan
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Re: 8x75 mm RS [Re: NitroX]
      #54454 - 09/04/06 01:41 AM

John,

RUAG offers 8X75RS with a 12.7 gram CDP loaded to 830 M/S. MEN does no longer offer 8X75RS ammo, am not sure if they manufacture civilian rifle ammunition at all

8X65RS brass could be formed from 7X65R

Cheers
/Johan



--------------------
© "I have never been able to appreciate 'shock' as applied to killing big game. It seems to me that you cannot kill an elephant weighing six tons by ´shock´unless you advocate the use of a field gun." - W.D.M. Bell: Wanderings of an Elephant Hunter.

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Pivi
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Re: 8x75 mm RS [Re: Yochanan]
      #116414 - 07/10/08 08:37 AM

Note that 8 x 65 RS is not the same as the 8 x 75 RS.


The 8 x 75 cartridge was made in 4 variations.Only the RS version is still available:

8 x 75 mm --rimless,318" bullet
8 x 75 S mm -- rimless 323" bullet
8 x 75 R --rimmed 318" bullet
8 x 75 RS -- rimmed 323" bullet

The rimless versions are very rare and original ammunition is scarce collector item

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Proud to be Furlan pividori.marco@gmail.com

Edited by Pivi (07/10/08 05:42 PM)

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93mouse
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Re: 8x75 mm RS [Re: Pivi]
      #116433 - 07/10/08 06:39 PM

Some load data by Norbert Klups:

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Pivi
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Re: 8x75 mm RS [Re: 93mouse]
      #116434 - 07/10/08 07:39 PM

Hi 93mouse,you should live not far from where I live.I live near Udine

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93mouse
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Re: 8x75 mm RS [Re: Pivi]
      #116445 - 07/10/08 10:54 PM

Hi Marco - not far indeed - you have a PM.

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NitroXAdministrator
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Re: 8x75 mm RS [Re: 93mouse]
      #116461 - 08/10/08 03:21 AM

2,500 fps isn't too bad for a 220 gr projectile.

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John aka NitroX

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Govt get out of our lives NOW!
"I love the smell of cordite in the morning."
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xausa
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Re: 8x75 mm RS [Re: NitroX]
      #116549 - 09/10/08 09:12 AM

I have a Krieghoff Teck O/U double rifle on order in this caliber.

According to DEVA (the German Research Organization for Hunting and Sporting Ammunition) the 8X75RS compares with the 8X68S as follows:

8X75RS @ 3880 Bar pressure: 220 grain Hornady @ 2591 fps. Water capacity 81.76 grains/5.30 grams*

8X68S @ 4400 Bar pressure: 220 grain Hornady @ 2804 fps. Water capacity 86.54 grains/5.60 grams*

In other words, you would sacrifice a little over 200 fps. for a rimmed cartridge suitable for a single shot or double rifle, with more than commensurate reduced pressure. A 12% reduction in pressure would result in a 7.5% reduction in velocity.

I would consider either load a good competitor for the .300 H&H, and a better choice than the .300 H&H as far as bullet selection is concerned, and the 8X75RS as a cartridge much more suitable for a double rifle.

This, despite the fact that I have killed over 90 head of African game with the .300 H&H.

The 8X75RS brass can be formed from 9.3X74R cases.*

* The Handloader's Manual of Cartridge Conversions

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Dr_Deer
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Re: 8x75 mm RS [Re: xausa]
      #140790 - 19/08/09 01:58 PM

Sorry to resuurect an old thread, but this particular chambering has popped up in some recent campfire discussions:-

Is anyone able to comment on the real world differences between this round and the .30R Blaser?

Would an antipodean be better with the 8x75RS and a set of forming dies to convert 9.3x74R brass than being restricted to expensive intermittant shipments of RWS .30R Blaser components?
Is the .30R Blaser that much more of a good thing to make it worthwhile?

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pulki
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Re: 8x75 mm RS [Re: Dr_Deer]
      #141425 - 01/09/09 02:13 PM

Dr. Deer :
I live in a place where reloading components are non existent. For making things more difficoult, my favorite hunting calibres are 30R Blaser and 8x68S. In my experience , if you have enough brass, it is easier to reload the 30R. I am disassembling rounds of other calibres (308 & 3006) to get them working (I have 2 rifles in 30R). The 8mm needs better suited powders to reach its potential.
With IMR 4350 I have obtained 2950 fps with 180 grs bullets,then I downloaded to get 2800 fps, so brass wil last longer.

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Dr_Deer
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Re: 8x75 mm RS [Re: pulki]
      #330929 - 08/08/19 07:43 AM

Reviving an old thread, I note the load with reloader 22 and a 220g SGK is achieving velocity on par with 200g bullets with Rottweil- whilst R22 is usually a fast choice I’m a bit concerned that 73g of R22 under a Sako Hammerhead 200g is listed as a max load in my copy of the DEVA manual
Anyone shot either load and lived to tell the tale?

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DarylS
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Re: 8x75 mm RS [Re: Dr_Deer]
      #330960 - 09/08/19 06:04 AM

The 8x75 MUST do better than 2,500fps with 220gr.?
Buddy of mine killed a charging grizzly with his 8x57 sporterized Kar. shooing 225gr. Speers with, I think ,54gr. Norma 205 (1979)or IMR4350, for 2,450fps.

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Daryl


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

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NitroXAdministrator
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Re: 8x75 mm RS [Re: DarylS]
      #330984 - 09/08/19 08:34 PM

Quote:

The 8x75 MUST do better than 2,500fps with 220gr.?
Buddy of mine killed a charging grizzly with his 8x57 sporterized Kar. shooing 225gr. Speers with, I think ,54gr. Norma 205 (1979)or IMR4350, for 2,450fps.



Daryl, you always fly faster than the rest of us mere mortals.

--------------------
John aka NitroX

...
Govt get out of our lives NOW!
"I love the smell of cordite in the morning."
"A Sharp spear needs no polish"

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