Using 7x64mm rounds in a 7x57mm mauser

[alfon99]

So this is what happens, I have a friend that has a mauser, The only thing I know about it is that it's chambered for the 7x57mm round and was made at the end of 19th century, this guy's grandparent used it in a civil war here in south america, in 1904. The thing is that this guy uses 100+ year old rounds, and has misfires all the time. In fact, he just got 5 rounds he calls "The new ones" that are from 1939. Now I'm planning in getting him some new rounds. The thing is that I don't know if I can find 7x57mm rounds over here. I have seen just 7x64mm brenneke rounds. Now my question is if they would chamber. What do you think?

 

[41magsnub]

No. Different cartridges. Will not chamber.

 

[rcmodel]

No, they will not chamber.

If he has a 7x57, thats what it chambers.

rc

 

[ThorinNNY]

Isn`t .276 Rigby the same cartridge as 7x57 Mauser? I believe the British just renamed the 7x57 .276 Rigby because of hard feelings toward the Germans after WW1.
Have you looked for .276 Rigby?

 

[alfon99]

If you mean .275 rigby, yes. But it's the same thing with another name. And I live in south america, not in the UK.

 

[natman]

No, 7x64 will not chamber. Don't even try.

The 7x57 was at one time a very popular round with the militaries of several South American countries. You would think that would make it a popular civilian round, although perhaps it is prohibited for civilian use.

 

[Numeric]

No, don't fire 7x64 in a 7x57 chamber, if you can even get it to chamber. Too bad, commercial 7x57mm from PPU is really cheap here in the states.

 

[Trent]

As others mentioned... those take 7x57 brass.

7x57mm brass is pretty cheap in the states, and brass (as far as I know) isn't restricted for export. I don't see any reason why you couldn't buy the components online and have it shipped to you for local reassembly.

 

[ball3006]

The second number is the length of the case. It ain't gonna fit.....chris3

 

[Lone Star]

True. The 7X64mm and the companion rimmed 7X65mmR for doubles or drillings is more like the .280 Remington, but maybe loaded a bit hotter.

If you can hunt in Argentina or have red deer there where you are, the 7X64mm with H-Mantle bullets should do fine.

Why can't your friend find 7X57mm? In most places, it's the more common cartridge.

How are gun laws in Uruguay?

Oh: the .275 Rigby was so named not to disparage German origin, but to make it a propietary cartridge, and to point out that it was loaded with John Rigby's superior patented bullets. There have been at least two loads, with 175 grain bullets and a High Velocity with 140 grainers. The last was higher velocity in the old days; average now. Federal makes a 139 grain or 140 grain that probably parallels it. So has Hornady.

Can you get US ammo there? German? Czech?

There were several Mauser rifles adopted in South American countries and elsewhere, and the M-93 and M-95 are not strong enough for use with modern loads. But I think that "normal" US loads like the 175 grain Remington are loaded with milder pressures for these older rifles. Ask the ammo maker.

The M-98 and its variants like the M-1912 should take any factory load in 7X57mm, but check with the ammo maker. Some receivers were relatively soft, I think.

 

[cal30_sniper]

There were several Mauser rifles adopted in South American countries and elsewhere, and the M-93 and M-95 are not strong enough for use with modern loads. But I think that "normal" US loads like the 175 grain Remington are loaded with milder pressures for these older rifles. Ask the ammo maker.

The M-98 and its variants like the M-1912 should take any factory load in 7X57mm, but check with the ammo maker. Some receivers were relatively soft, I think.

The 93 and 95 Mausers are more than safe for any current factory loading of 7x57. In fact, the SAAMI pressure that all the loadings are limited too is 46,000 CUP, which is actually lower pressure than the original round those rifles were designed for. The modern ammo warnings only applies to reloading, where some manuals show loads for modern pressures above the SAAMI limit which are not safe in the pre-98 Mausers. Any Model 98 derivative will also be safe, and as long as the rifle is in good shape, it will be perfectly fine with higher pressure hand loads also.

Of course, common sense rules still apply, like checking the headspacing for lug setback, inspecting the receiver and bolt for cracks, and ensuring no unsafe modifications to the rifle have been done. That should be common practice with any vintage firearm.

 

[Lone Star]

cal.30sniper-


You may be correct re SAAMI pressures, but he may be about to use European ammo, which may be loaded hotter. I don't know their pressures.

I understand that some M-95's did have lug setback problems and were set aside after test firing in some countries, but that they were eventually sold as surplus.

 

[Mp7]

...

hmm... in the land of origin, it`s still available.

Find him a shop that imports.

http://www.waffen-braun-shop.de/Produktgruppen/Munition-7x57/

 

[cal30_sniper]

cal.30sniper-


You may be correct re SAAMI pressures, but he may be about to use European ammo, which may be loaded hotter. I don't know their pressures.

I understand that some M-95's did have lug setback problems and were set aside after test firing in some countries, but that they were eventually sold as surplus.

Prvi is loaded below SAAMI spec. Sellier and Bellot is loaded hotter, but still appears to conform to SAAMI pressures. Norma is the hottest stuff out there that I've seen, but is still loaded below CIP standards. European ammo is loaded hotter, but its not a free for all. Personally, I wouldn't feed mine a steady diet of Norma, but that's just because I've got other 7x57s on 98 actions that have a better safety margin if something does go wrong.

The crucial thing, as I mentioned before, is checking the headspace. Excessive headspace indicates lug setback. If the rifle has excessive headspace, don't shoot it. Pull the barrel and have a look at the lug shelves in the receiver. If they show setback, saw the receiver in half, and get another rifle. It's not worth messing with.

 

[alfon99]

No, there are no red deer over here in uruguay, just axis deer, or chital. In Argentina, probably yes. But I live in uruguay. Gun laws here are much better than in the U.S. There are 2 licenses. The first one is limited up to 6.5mm in rifles, 44mag in revolvers, 9x19mm parabellum in pistols, and all shotgun gauges. And the second one, Is as easy to get as the first one, and you can own anything if you want (a friend has an m60). And sorry, I forgot to mention the 0.10$ cent fine. And about the ammo, yes, you can get any brand and caliber, but the thing is that I don't live in the capital city. I live in the country.Next time I go to the city I'm getting the .30-06 I was talking about some weeks ago in the thread ".30-06 for 13 year old?". And I hope I can find some ammo for this guy.

 

[ironworkerwill]

But what about Popua New Guinea?

 

[Cosmoline]

Unless there's one of those weird restrictions against "military" rounds, you should be able to find 7x57. It's was used all over the place in South America for the better part of a century.