DarylS
.700 member
Reged: 10/08/05
Posts: 27635
Loc: Beautiful British Columbia, Ca...
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Quote:
I was fortunate to pick up some Kynoch original 375 X 2½ in sealed boxes date coded 1938. In the interests of research I pulled one cartridge and it contained exactly 40 grains of stick cordite in a balloon head case. The bullet had a thin glazed card wad underneath it. The bullet weighs 270 grains and is stab crimped into the case very close to its base. Amazingly the bullet has the letter “K” embossed on its base. Heaven alone knows why they did that but it does look nice. As I had 34 rounds of this I shot five rounds over my chronograph to see what they do. They averaged 1958 fps and were very consistent. They are undoubtedly corrosively primed so I had to scrub the gun out well afterwards. A reproduction of an old ICI Sporting Ammunition Catalogue I have gives a muzzle velocity of 2100 fps from a 25” barrel but I can only report the results I got.
I hope you used water as well as oils later. The nitro solvents will not get rid of all of the gun barrel 'toxins' that are contained in corrosive primers.
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Daryl
"a gun without hammers is like a Spaniel without ears" King George V
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Sarg
.400 member
Reged: 20/01/07
Posts: 1365
Loc: Nil
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Sounds exciting Tinker , can't wait for a report !
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Oldbrit
.333 member
Reged: 04/04/10
Posts: 381
Loc: UK
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Quote:
I hope you used water as well as oils later. The nitro solvents will not get rid of all of the gun barrel 'toxins' that are contained in corrosive primers.
Ballistol and water... lots of it, followed by normal cleaning.
I'm loading 47 grs of Re 15 behind a hard cast 270 gr gas check bullet in my 1902 Webley. This approximates the old Kynoch cartridges I tested. I've used 44 grs behind a 300 gr Hornady solid but never chronographed it. The cases dropped out and I feel I could have gone a bit hotter but I don't want to strain the old lady.
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Ulfhere
.224 member
Reged: 06/10/07
Posts: 16
Loc: AL
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The old and very popular 375 NE (2-1/2 in) may have originated with Holland, but it was widely used in the gun trade. When Holland brought out the 400/375 for their highly modified Mannlicher-Schoenauer rifle in 1905 I guess it created some envy because here was what a lot of folks thought was the hottest bolt action going loaded with something that gave the velocity of a 303 (better actually) with the diameter and bullet weight of a more substantial medium bore thumper.
The 9.5 x 57 mm Mannlicher Schoenauer, introduced in the Model 1910 rifle, may have been designed by Westley Richards, not Steyr. I think it was brought out specifically because Holland controlled the only rimless 375 on the market. And of course only a year after Westley Richards duplicated their 400/375, Holland trumped that by bringing out the 375 Belted Rimless Magnum Nitro Express (better known as the 375 H&H to us today). The big magnum 375 is what killed the smaller 375s, not any lack of performance. These cartridges are all in the same class as the 348 Winchester, 358 Winchester, 9.3 x 57 mm Mauser, etc, which is to say they are serious medicine for nearly anything.
My brother is rebuilding a 1910 MS for me right now and I will post a web page on the project when it is complete.
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kuduae
.400 member
Reged: 13/01/10
Posts: 1803
Loc: middle of Germany
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I very much doubt that either Steyr or Westley-Richards designed the 9.5x57 Mannlicher-Schoenauer aka .375 Rimless Nitro Express from scratch! The 1904 DWM catalog shows a case called "9.4x56" (after bore diameter?). The DWM case #393 points to the mid-1890s. For use with this case the catalog shows bullet #156, a round nose fmj 9.6mm = .378" diameter of 25.7g = 396 gr! The drawing of case #393 looks just like the later 9.5x57 with a M88 base, a straight body and a steep shoulder.
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tinker
.416 member
Reged: 12/03/05
Posts: 4835
Loc: Nevada
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FWIW
48 grains looks to be a full case in formed R-P .444 Marlin brass with the Woodleigh roundnose.
Cheers
Tinker
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--Self-Appointed Colonel, DRSS--
"It IS a dangerous game, and so named for a reason, and you can't play from the keyboard. " --Some Old Texan...
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tinker
.416 member
Reged: 12/03/05
Posts: 4835
Loc: Nevada
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That 48gr IMR 4320 in formed .444marlin (needed base turned a few thou too) with the Woodleigh soft just shot into 2" at 100yd over the express sights of an orig Lee Speed sporter.
I have Krag brass here that looks like it'll work without turning the bases.
I'll post on that when I have something to say.
Perhaps later today I'll get good chrono data to share too.
Sweet.
Cheers
Tinker
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--Self-Appointed Colonel, DRSS--
"It IS a dangerous game, and so named for a reason, and you can't play from the keyboard. " --Some Old Texan...
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joelblack
.275 member
Reged: 05/06/12
Posts: 61
Loc: WI, USA
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I used to own this on in in .375 2 1/2R. I would neck up .303 cases to .375 and seat round nose 270gr bullets out a little longer than normal for it to feed correctly.
Edited by CptCurl (18/11/12 11:12 PM)
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lancaster
.470 member
Reged: 06/05/08
Posts: 9476
Loc: There's a lighthouse in the mi...
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the difference in lenght is respectable
303 necked up to 375 and 375 NE 2 1/2( 405 Win basic)
dont know if you get set the 270 grains roundnose to fit the original length but, of course, into the Mannlicher the 375 NE have to be 2 mm shorter than usual.
I would not do this when Hornady 405 Win brass is available.
Edited by CptCurl (18/11/12 11:12 PM)
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