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Sorry, it was a typo. I knew it must be Rimmless. Thanks for the reply!

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What firearm(s) are you intending to feed?

If it's the Mannlicher Schoenauer M1910, you do not want the .375 NE 2.50", as the MS is 2.25".

The proper cartridge for an M1910 MS went by many names, including 9.5X57, 9.5X56, .375 Nitro Express, .375 Nitro Express Rimless, .375 RNE, and more.

The 9X57 is a different cartridge which does not interchange with 9.5X57, though when I ordered my RCBS dies about 1990 they came to me in a box marked 9.5X57 MAUSER. I phoned RCBS and was repeatedly assured that they were the proper dies for my M1910 - they were, and make perfect replicas of DWM 531 with proper neck and shoulder dimensions. Brass formed through them from fresh .35 Whelen ends up a bit narrower than spec. toward the base, but fireform just fine.

If you're feeding the M1910, you want a RIMLESS, non belted (no Velopex) .375 (9.5mm) by two and a quarter inch (57mm) cartridge.

Proper dies for M1910:






A cartridge from Reed's Custom Reloading (Oklahoma), one of my old handloads, original DWM 531, fired brass from my old handload. My handloads from fresh .35 Whelen, Reed's from new Norma 9.3X57 drawn straight, then formed.

Proper dimensions of 9.5X57 / .375 Nitro Express Rimless 2.25" :



The 9.5X57 and .375 RNE 2.25" are identical in every respect except for the propellant load of original cartridges, which was two grains lighter on the British (RNE) load. Some speculate that this was to compensate for the African and Tropical climates often encountered by intrepid British 'traveling sportsmen' and professional hunters:




Assorted Images:









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Citizen of the Cherokee Nation

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Thank you Brian for all the info. I know it needs to be the 2.25. I was just confused by the sales order that said 9.5x57 Mauser!

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Lets hope for the best

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Some brands – except RWS – of common (outside America) 9.3x62 brass are even better for reforming to 9.5x57 M-Sch than scarce (outside USA) .35 Whelen.

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Very interesting about the European 9.3 vs its U.S. counterparts, unfortunate about .35 Whelen scarcity in Europe.

The Whelen that I have used was (fresh) Remington - Peters and went through easily with a single pass, leaving proper shoulders and neck.

Does anyone recall offhand which expanders Vintage Canvas would need to work .30-'06 to the .375 neck? It's been posted previously.

If available in SA, there's this: https://www.qual-cart.com/



More expensive than 'pick up brass', but properly sized and headstamped.

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Citizen of the Cherokee Nation

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Lets hope for the best

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Some recommended reading for Vintage Canvas: https://www.africahunting.com/threads/ma...velocity.47277/

The third post is directly relevant to issues you will encounter while reloading for the 'prewar' MS. Ignore the DWM 'Cordite' comment / warning, as Kuduae accurately pointed out that the Deutsche firm did not use the stuff . Goes for old enough Brit. cartridges, though.

There is considerable redundancy throughout the remainder of the thread (of course, I wrote much of it) as there are a variety of linked posts, magazine articles. and general MS discussion. Much good information to be reviewed, however.

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Citizen of the Cherokee Nation

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Some brands – except RWS – of common (outside America) 9.3x62 brass are even better for reforming to 9.5x57 M-Sch than scarce (outside USA) .35 Whelen.

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Very interesting about the European 9.3 vs its U.S. counterparts, unfortunate about .35 Whelen scarcity in Europe.

The Whelen that I have used was (fresh) Remington - Peters and went through easily with a single pass, leaving proper shoulders and neck.

Does anyone recall offhand which expanders Vintage Canvas would need to work .30-'06 to the .375 neck? It's been posted previously.

If available in SA, there's this: https://www.qual-cart.com/



More expensive than 'pick up brass', but properly sized and headstamped.

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I use a 44 mag. expander with a slightly more tapered nose, or a .45 colt expander with tapered nose, to expand .30/06 out straight - one pass. Inside lube with Imperial or other good case lube.
This even worked with brass that had been fired as .30/06 a few times. I then use the FL die to neck them back down partially, trim to length, then neck all the way for proper headspace. This was when forming .30/06 brass to 9.3x62 or .375/06IMP.
Same process.

This has been shown on here several times now. I no longer have a photo upload site, so it will not be shown yet another time.

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Daryl


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

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Bullets not a problem, as we have a company that produce all kinds of bullets for even the scarcest calibers.. called Claw bullets. Another one is Stewart bullets. They make to order and very cheap in your required grain and pattern. They even make cheap bullets for target and range practice.

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I use a 44 mag. expander with a slightly more tapered nose, or a .45 colt expander with tapered nose, to expand .30/06 out straight - one pass. Inside lube with Imperial or other good case lube.
This even worked with brass that had been fired as .30/06 a few times. I then use the FL die to neck them back down partially, trim to length, then neck all the way for proper headspace. This was when forming .30/06 brass to 9.3x62 or .375/06IMP.
Same process.

This has been shown on here several times now. I no longer have a photo upload site, so it will not be shown yet another time.

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