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Discussion Starter #1
You read so much and after awhile you dunno what to believe!

OK, will the the 375 H&H work in a large ring non-magnum mauser 98 action? Like a Brazilian 1908?
 

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I say no. (At least with a std K98 action)

BUT someone willing to cut, chop and weld would make one.

The magnum action is needed. Maybe for the RUGER 375 tho...


CW
 

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Yes,with lots of work.This is what Mauser used the standard 98 action.They did not build a magnum action in the old days.If you want one in the Mauser,look for a Interarms Mark Ten, built by Zastava in Yugoslavia.No longer imported by Interarms,but Still out there in the used market.I've had quite a few over the years,Still have one.Nice and trim compared to my overbuilt CZ.Well built and shoot rather nicely
 

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Over All Length
8mm 3.17"/ 3.55"
375 H&H 3.6 (this is what the book says but it seems short. The 300 grain bullets I have are closer to 3.75 to 3.8" )
338 WM .330
450 marlin 2.2"
458WM 3.34
If you are looking for a big thumper for an action you own. Don't over look the 338 Win mag.
Had 450 Marlin come out a year earlier I would not have built a Siamese action 45-70 but would have made a 98 action 450 Marlin. It would have been cheaper and I would have had the stock I wanted instead of the stock they made.
You can also go 458 Win Mag but NOT the 458 Lott (needs Magnum action.)
 

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mcwoodduck said:
Over All Length
8mm 3.17"/ 3.55"
375 H&H 3.6 (this is what the book says but it seems short. The 300 grain bullets I have are closer to 3.75 to 3.8" )
338 WM .330
450 marlin 2.2"
458WM 3.34
If you are looking for a big thumper for an action you own. Don't over look the 338 Win mag.
Had 450 Marlin come out a year earlier I would not have built a Siamese action 45-70 but would have made a 98 action 450 Marlin. It would have been cheaper and I would have had the stock I wanted instead of the stock they made.
You can also go 458 Win Mag but NOT the 458 Lott (needs Magnum action.)
Yup loads of good calibers. Thats why I mentioned the 375 Ruger. Gets ya 375 preformance in a shorter action... but it is fat and may offer other problems for the 98 action...

CW
 

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Technically, the proper length of a 375 H&H cartridge is 3.6, 30-06 goes 3.34, and 8x57, intended for most German made Mausers, is 3.228. You could probably stuff a 375 into a 30-06 action by taking another 10 thou off the case and using short bullets, but that is not really a 375 H&H anymore, and the case does not have a very long neck to begin with, so it might not grip the bullet right. In my experience, 30-06 length Interarms actions have a pretty generous mag box, but all Interarms are not the same. What you really want to avoid is an action that has had metal removed from the feed ramp area to accommodate a longer cartridge, since the action is now weakened and not safe.
Jerry Kuhnhausen's book "The Mauser Bolt Actions, a shop manual", is absolutely essential for anyone fiddling around with Mausers. He cover all this and a lot more. I am NOT quoting him on whittling down the 375 to make it work - his advise is get a magnum action. Of course, boys will be boys, and sometimes you just gotta try something. I went through all this setting up a 30-06 length Interarms for 404 Jeffery, a cartridge that falls between standard and magnum length. Be aware that the Interarms action is a super-hard alloy that is very frustrating for someone with a hand file or rotary tool, not at all like the gun steel of the early or mid 20th Century, so you should find a 7 Mag, 300 Mag or anything else that already feeds the belted case.
 

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mauser98us said:
Yes,with lots of work.This is what Mauser used the standard 98 action.They did not build a magnum action in the old days.If you want one in the Mauser,look for a Interarms Mark Ten, built by Zastava in Yugoslavia.No longer imported by Interarms,but Still out there in the used market.I've had quite a few over the years,Still have one.Nice and trim compared to my overbuilt CZ.Well built and shoot rather nicely

That is incorrect !!


Mauser Obendorf certianly made magnum length actions many of which had integral scope bases. They made them especially for Rigby of London for one thing and quite a few British Gunmakers acquired them and built superb Big game rifles on these Magnum Mauser actions. Gibbs of Bristol, Westley Richards, Boss, Jeffries,Holland & Holland plus of course Rigby for cartridges like the 505 Gibbs, 425 Westley Richards, 404 Jeffries, 416 Rigby to mention just a few.
 

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Mauser Obendorf certianly made magnum length actions many of which had integral scope bases.

True, and they were/are very expensive! Years ago I had my local smith ( a very talented man) open up (he read up on just how to do it safely) and customize a military Mauser 98 action for the 404 Jeffry. It took a lot of work, yes, but it ended up a fine rifle. Unfortunately, while the rifle was being made , I bought a custom Mauser 98 ( made the same way from my smith;s friend) in 458 Lott, never got a chance to fire it as I had a tear develop in my left retina ( non recoil related, ha) and after a year ( all of 2002) of four different repairs/procedures I stopped using the heavy kickers. I now use a braked Mod 700 Classic 35 Whelen reamed out to the Ackley Improved, which is a real killer itself) But no more bonafide 'elephant guns for me", Bummer, but yes, the old Mauser 98 can be used for the 375 and others. Although, with the 375 Ruger available now it makes more "sense" but it doesn't have the nostalgia, ha. Look on Gunbroker, they have an Interarms Whitworth Express that is a wonderful DGR. I've owned three through the years ( left my last one in South Africa for my friend) 2 375s, 1 458WM. Excellent rifles. CZs are nice, but a tad heavier than the Whitworth. Good luck to you Pard!
 

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The 458 Win mag of course was developed so that normal 06 and Mauser 98's could be used to build them as it's a Short magnum cartridge.
 

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Quite right, but the cartridge proved to be a bit of a disappointment, as the 2000 fps goal was not easily attained, the culprit being the idiotic belt, depriving it of crucial capacity. Enter the Jeffrey case (or Jeffries), with that beautiful fat plain base, but for some reason Ruger decided to make theirs just different enough not to interchange. One option for near-375 performance in a standard action is the 9.3 X 62. True, it doesn't quite duplicate the standard 375 H&H, but only a ballistician could tell, not the average bear, or even a very bright one.
 

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Lil story about my Mauser 35 Whelen and action lengths...

Back when I built my first Mauser, I wanted a 350 Rem Mag. Mostly because its a red headed step child of the short magnums... Well it was a problem, feed rails, opening the bolt for the larger head... (1898 Argentine action) I decided to go with the Whelen. I briefly looked at the brown Whelen, but die costs where prohibitive for me so I went with a custom grind with a deeper throat allowing my bullets to be seated long. I also left the barrel long at 28". These things combined to allow me to net some darn respectable velocities. Like 200g at 3000 and a 250g at 2600+ with no pressure signs . Bolt lift is butter and cases fall form the chamber. The Shillen barrel delivers the bullets accurately.

One problem we had was the long seated 250g bullets and the box magazine... it would not work. We milled the back of the box as much as possible and a lil off the front to fit, it was close. I think I had to seat a bit deeper IIRC. (It was 1987)

Your mentioning the 9.3x62 made me think of this as so many are quick to proclaim it a 375 H&H light... I dont see it. :)

I know its got the heavier bullet at 286 & 293g, but Barnes had 280's & 300g's used to be offered for the 358 too. My whelen can exceed "book" number for the 9.3x62. A whelen with a throat job to allow longer seated bullets and a good hand loader should do about the same...

CW
 

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I know the cartridges are very close, and an American has gotta love shooting something with TW's name on it, but the metric case is a bit longer and fatter in the body, and it does hold more propellant. I've just started playing with mine, can't believe how lazy I've gotten, but with just a little bit of work book numbers are easy. I was also very devoted to 35 Whelen in the 80's.
 

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Brit hunter was correct. I was having a brain fart when I posted that.What I meant to say was the Interarms Whitworth was built on a standard,albeit commercial 98 action.Dunno why I posted that,I know better.Good call!
 

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My Question is, Do you have a 1909 action just hanging around that you want to do something with or do you have an affinity with the 375H&H and think the 98 is the cheapest way to get one?
 

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Discussion Starter #17
I would say I HAD a 1909 action hanging around but am having a 7x57 barrel mounted on it this week. The other is having a new 8x57 and the third is going to sport a 22-250.

I guess the best bet is to pay the freight on a magnum action but......, boy that 9.3 sounds sweet.
 

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9.3 X62 is a neat round. And there are a lot of great bullets loaded in it.
I would look at the price of ammo and how easy it is to find.
If your reloading then never mind. But you may want to look at the 338-06 if reloading and the 338 WM if not.
Lots of good bullets in many weights and designs for 338 and easy to get hold of. But I'm a fan of the 338.
 

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Good morning
This was an interesting read. One aspect of the 375 H&H that has always been my inclination to it is it's wonderful compatibility with heavy cast bullets. That marvelous long tapered case is perfect for the launch of 340+ grain gas checked flat nosed cast at 2200 -2300 fps. Good doses of 4831 and other slow powders make for a very deadly long penetrating projectile out to 300 yards. I would not trade mine in for any newer shorter fat bodied case. My old Interarms 375 will be with me until the end.
Mike in Peru
 
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