I have a mauser action and am wanting to build a 9.3x64, but the receiver has a claw mount dovetailed into it. My question is, would the 64 create too much pressure and would I be better off building a 9.3x62.

load x64 to x62 vel. for lower pressures.

I received an old Mauser receiver (stripped) some years ago from a friend. It is extensively engraved and also had claw mount bases. I really wanted to build something with it but one nagging question bothered me.

The bases are I'm guessing, soldered to the receiver. Such would prevent heat treating. For that reason I decided to stick to a somewhat lower pressure round. Say <40,000psi. Just a thought.

Now as to those bases. Do you have the rings to go with them? I didn't and making them was quite a challenge! Finally got it after several tries but I wouldn't want to do it again.

I am in that conundrum now. I don't think it wise to use a dovetailed receiver for a 9.3x64 project. The next problem is the bottom metal for the 64. Blackburn and I are working that out now. So far his suggestion is use 375 H&H bottom metal as it is about the right shape even though a little long for the application. I like the 64 a lot. I have on in a pre-64 model 70 Winchester. I also have 4 of the 62 variety. There is a difference in speed but I doubt not as much on game performance. Everything I have killed with either round never went far before expiring.

The space btwn the "claws" is the compelling difference. The two varities were available..at least until a while back...check out the Recknagel site.

If the bases are truly soldered on and they are the old claw spacing, why not just remove the base and install the modern variety via drilling and tapping...You could then re-heat treat.


If the receiver ring is dovetailed..well a different kettle of fish. I have been told that if submitted to proof in Europe, those receivers are destroyed without comment...maybe our European friends could clear that up!

So...if that's true, there is a safety concern! Here's where I'd personally not even consider the 64mm variety...bigger case, longer..means opening up eveything with a suspect receiver configuration to start with. Why do it?

You could use a dimensonally suitable 30-06 bottom metal without much problem (maybe a little work on the rails)...and have yourself one hell of a nice rifle

Thanks, with any question of strength I'll scrap the 64 and go with a 9.3x64.

I mean 9.3x62.

I am not sure modern loads in 9.3x62 are lower pressure than 9.3x64. Both commercial and hand loads do about 2400 fps with a 286 gr bullet, from a 30-06 size case. Anyone with better info on comparative pressures? Quickload?

quote:

If the receiver ring is dovetailed..well a different kettle of fish. I have been told that if submitted to proof in Europe, those receivers are destroyed without comment...maybe our European friends could clear that up!

So...if that's true, there is a safety concern! Here's where I'd personally not even consider the 64mm variety...bigger case, longer..means opening up eveything with a suspect receiver configuration to start with. Why do it?

No it is not correct. I had just such a reciever re-barreled by us in .318 WR pass proof in London just last week without comment.

Regards

I would go with the 9,3x62.

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Originally posted by Mark Neal:

quote:

If the receiver ring is dovetailed..well a different kettle of fish. I have been told that if submitted to proof in Europe, those receivers are destroyed without comment...maybe our European friends could clear that up!

So...if that's true, there is a safety concern! Here's where I'd personally not even consider the 64mm variety...bigger case, longer..means opening up eveything with a suspect receiver configuration to start with. Why do it?

No it is not correct. I had just such a reciever re-barreled by us in .318 WR pass proof in London just last week without comment.

Regards

OK glad that yet another bit of misinformation has been cleared up..here in the colonies..Opening 98's to 375 HH..any offical position on that ? We get a lot of "expert " opinion here

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I had just such a reciever re-barreled by us in .318 WR pass proof in London just last week without comment.

Can you please explain exactly what this "proof" process is?....how many shots at what pressure and how is it then determined if the gun has "passed".

I, for one, would like to understand this better.

Emron, according to Quickload, the max diameter of the shank of a 30-06 is 11.96mm/.471", the 9.3x62 is 12.1mm/.476" while the 9.3x64 (a dandy cartridge indeed) is 12.88mm/.507"; they are different cartridges. Furthermore the x62 max pressure is 3900 bar, while the x64 is 4300 bar and has about 12% more capacity.

Vapodog, at the italian proof Office, every rifle must bear a 2 round test, delivering at least 30% more pressure than the max CIP, without any damage. Since the various EU proof Offices are linked by international regulations and are reciprocally recognised, the tests are very likely identical.

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Vapodog, at the italian proof Office, every rifle must bear a 2 round test, delivering at least 30% more pressure than the max CIP, without any damage. Since the various EU proof Offices are linked by international regulations and are reciprocally recognised, the tests are very likely identical.

That is correct. The rifle is examined before and after the test.

Regards

quote:

OK glad that yet another bit of misinformation has been cleared up..here in the colonies..Opening 98's to 375 HH..any offical position on that ? We get a lot of "expert " opinion here

There is no "official opinion" as such. The chaps that conduct the tests are hugely experienced and they will refuse to proceed if there is anything that is obviously dangerous. 98's in 375 are fairly common. If they pass proof then that is the end of the matter.
It is in essence a good test. They re-decorated a couple of months ago but they used to have a rogues gallery of destroyed items around the place. They have absolutly no fear in destroying your cherished item. If it does not come up to par then proof will likley break it.
On the day I took my first DR in they had great pleasure in telling me that just the week before they had shot a brand new .600NE from a much larger manufacturer than me off the face. That was sobering as they pulled the lanyard on mine !!

This is a rather crappy "work in progresss" client picture of the dovetailed reciever in question.


Regards

Here are some photos of a friends custom 9.3x64 being built on a VZ24 M98 with Walther barrel and Recknagel sights and bottom metal.

Very nice stuff as George would say!

Ozhunter,
would the initials of the smith doing that 9.3x64,by some chance be, V.S. ?