Anyone have a gun in this caliber?

Yes, I have a Oberndorf Type B Mauser. Nice caliber, but the brass is hard to come by or maybe I do not know where to look. Recoil is very manageable. This is off the top of my head, but my recollection is that I was getting between 2100 and 2200 fps with 347 grain Woodleighs. I was not, however, pushing the reloading envelop.

Griffin & Howe has one for sale made by Lon Paul. Very nice piece, but a bit more than your Rugers, Dave!!!

this was a relatively common big bore in India - called the 423 Mauser. My dad had one in the 50's.

I think Honneber make brass. The 2200 fps for the 347 gr bullet was the original loading and modern powders wil give 2200 with the 400 gr bullet to equal the old 404 Jeffery performance. But then the 404 Jeffery will do 2400with modern powders.

I have always wanted one of these rilfes and had found a couple here in India (I am visiting for a month right now) but one nice Mod A has been paid up and gone! The other is not as nice and has a painted stock!

I will try to remember to post a few pictures of mine this evening. Horneber does make brass, getting it over here is another issue.

mine is currently having scope rings fitted..
its a cigerette gun, double triggers, claw bases, trim stock, that i am reworking for a PROPER length ... 3.35, and crimped on the groove of the hornady 400gr DGX..

yes, that means its "really" a 404, and the dies are custom made for that setup, with CIP, not saami, specs for the chamber. US specs are off.

I have Pierre van der Walt's new book, African Dangerous Game Cartridges and, contrary to John Taylor, he says the 10.75 Mauser is a great cartridge and that Taylor's criticism should have been directed at the German bullets of the day and not the gun. According ot Pierre, it's still alive in Africa and has been used with success on everything. I like metric calibers. I think I need one

quote:

Originally posted by MJines:
I will try to remember to post a few pictures of mine this evening. Horneber does make brass, getting it over here is another issue.

Mike:

I just checked Midway and they have Bertram brass in stock. I couldn't find it listed among the Hornebur brass at Huntingtons

quote:

Originally posted by Biebs:
Griffin & Howe has one for sale made by Lon Paul. Very nice piece, but a bit more than your Rugers, Dave!!!

Biebs:

It is a nice gun. What do you think on the price?

Great caliber but may be a mistake to own? Why is that?

Well Horneber is rumored to be going belly up, and then brass will no longer be available unless you can live with Bertram brass and I cannot..

I have built two 10.75x68s and a beautiful Henry Akin 10.75 x 68 and I sold all 3 of them on AR come to think of it....

It is a neat caliber and can be built on a standard Mauser action or whatever...It will get you 2100 plus FPS with a 400 gr. Woodleigh or 2380 FPS with a 350 gr. GS Customs or Barnes Monolithic bullet,

The case itself is quit long to the shoulder and if you had to change it you would progbably need a new barrel or cut the old barrel back considerably and rechamber to a 404 Ruger or 404 Jefferys or whatever..The 404 Jefferys is a very touchy gunsmith operation and I had one rifle ruined doing that, but the smith was fair and bought the gun..

Is it worth the grief today, I don't think I would be interested in another one, been that route and given the lack of available brass, it's just not worth the grief to me....

Even when I owned them brass was all but impossible to obtain, but eventually ordered 500 or so rounds of Horneber cases from Huntingtons and I sold that stuff with the last one I built. LB404 on AR purchased the reamaining stock Huntington had. He did get some more a long time later and it sold out and that was the last I was able to find.

But if one is determined, then Dennis Olson has a reamer, Hungtinton may have a small supply and I would buy it all...

My suggestion is forget it and go with a 375 Ruger, or 338 Win. necked up to .423 bullet built on a std. size action...Just my opinnion based on past experience.

The sad thing is that it is the most overlooked cartridge in the world and deserves a better opertunity to survive than it gets...Light, handy, mild in recoil, and very capable of killing any animal on the planet.

I shot 4 or 5 buffalo with mine and it worked as planned, much like one would expect from a 450-400 as it duplicates the 450-400 to a T.. What more could one ask...

Attached are some pictures. The loads I tried were 64 grains of H335, WLR, 347 grain Woodleigh SP for 2125 fps and 66 grains of IMR4064, F215M, 347 grain Woodleigh SP for 2190 fps. For someone with Pierre's new book, what loads does he list for the 347 grain Woodies?

Should look familiar. The fellow that redid the stock did a good job. I like how he handled the cross bolts.

quote:

The fellow that redid the stock did a good job. I like how he handled the cross bolts.

The finish looks great too.

I agree that the 10.75X68 is one of the most overlooked of the large/medium bores.

I have two. A typeA and a typeB.

I have seen other Mausers with the rear recoil lug. What does the lug rest against within the stock? Looks like it is forward of the rear action screw.

My dad and me builded a 10,75 Mauser rifle in the 90´s. It´s a good round, easy to reload. I bought the last factory ammo from RWS in the 90´s, ~340 rounds. Brass is good. In the first years I used Woodleigh bullets, but now I´m loading the 350grs protected point, made by Degol/belgium.

Martin

quote:

Originally posted by Atkinson:
Great caliber
It is a neat caliber and can be built on a standard Mauser action or whatever...It will get you 2100 plus FPS with a 400 gr. Woodleigh



But if one is determined, then Dennis Olson has a reamer, Hungtinton may have a small supply and I would buy it all...


450-400 as it duplicates the 450-400 to a T.. What more could one ask...

Sound good if you can stock up on Hornerber cases.

Mjines:

Pierre doesn't list specific bullets. He just list them by weight. On some he gives a minimum charge. Where there is only one load listed, that is the max charge. With a 347 grain bullet and available American powders, here is what he lists all from a 24 inch barrel:

POWDER/MIN/MAX/VELOCITY

RL12 67 gr 74 gr 2360 fps

H335 64 gr 2344 fps

IMR4350 74 gr 2111 fps

IMR4064 64 gr 2191 FPS

IMR3031 60gr 63 gr 2213 fps

IMR4198 58 gr 2411 fps

All the above loads come from Rifle No. 134 March 1991.

He prefers powder from about 3031 to Reloder 15 and and says, that because of the limited case capacity, the only bullets that are really suitable are 347-350 grain bullets and lighter.

Hope this helps.

quote:

Originally posted by Dave Bush:
I have Pierre van der Walt's new book, African Dangerous Game Cartridges and, contrary to John Taylor, he says the 10.75 Mauser is a great cartridge and that Taylor's criticism should have been directed at the German bullets of the day and not the gun. According ot Pierre, it's still alive in Africa and has been used with success on everything. I like metric calibers. I think I need one

Well Dave, if you like metric calibres get a 10.75 X 73mm.

You got me Wink. I went searching for the 10.75X73. Already had one. Want something different.

quote:

Originally posted by Dave Bush:
because of the limited case capacity, the only bullets that are really suitalbe are 347-350 grain bullets and lighter.

Hope this helps.

I beg to differ .. the only suitable bullet weights, at spec length, are the350 class... however, a spec oal of 3.19 is wasting nearly a quarter of an inch in MOST 98 mags,,. 3.34 ..

mean that one CAN use 400gr bullets, on the crimp groove...

which is perdactly what I am doing

NOT trying to make a 416 rem out of it.. but it will easily make 2200 with 400gr pills ... the case is larger than a 416 taylor... which some folks overload to 2400 fps...

Jeff, don't kill the messenger. I am just telling you what Pierre says. He also says the cartridge has a preference for 4th generation bullets (Expanding jacketed soft point bullets without special features as found on original Kynoch ammunition and available from Hornady, Sierra and Speer as well as Nosler Partition and similar designs not using bonded core technology). This in interesting since neither Hornady, Nosler, Speer, or Sierra makes a .423 347 grain bullet. However, I can't help but think that the Woodleigh 347 RN Sf would be just the ticket. Hawk also makes a 350 and North Fork makes a 340.

If we could only get somebody to make some brass but a simpler solution might be to just neck up the .416 Ruger and call it a .423 Ruger or go with the 404 Dakota. I don't want another Jeffery.

Here are pictures of mine. I have been in contact with Dave Norin, Gunmaker about restoring the rifle.

I tried to order HORNEBER "350 Rigby Mag Rimless" (100 pieces) brass from custombrassandbullets.com and received the following email: "I'm out of stock but I will check with our supplier if there is any available. There has been some problems with Horneber over the last year, were not sure if they are producing brass".

MJines, wonder if mine was next to yours in the rack when Mauser was buikding them.

Pretty cool those serial numbers. They are about as close to siblings as you are likely to find.

I have a 10.75x68 used take buff and plains game last year. I used 400gr AFrames and custom turned solids, both at 2150fps using 4895. The recovered Swift performed as advertised, the solid was a pass through and not recovered.

quote:

Jgrabow6493: Here are pictures of mine. I have been in contact with Dave Norin, Gunmaker about restoring the rifle.

I like it the way it is, but to each his own.

12.7 x 68 mm ... only 1.95 mm difference in designation.
This one is in a Winchester, but a Mauser is in the works.
Close enough?
Well, the case length is the same ...

Mike,
I would kill for your 10.75x68, never let me near it bro!!!

Here´s a pic.




(I changed befor a few months the double set trigger to a Recknagel single stage)

Martin

A couple I used to own, guess I should have kept, but I prefer the more versatile 404, which can also be built to the same weight on a standard length action:

I own the Hoffman in 10.75x68 that Ray Atkinson sold me years ago. Bought 500 rounds of Horniber brass to feed it. Points like s fine 28 ga. shotgun and very accurate with iron sights. Easy to carry. Hunted hogs with it. Wanted to take to Africa with me but always took a different rifle. I used 350 Barnes X bullets as well as Northfork solids and cup points in400 gr. in that rifle. That is one fine caliber. Wish Barnes would make a spot run on 3s50 gr. Xtype bullet

quote:

Originally posted by RIP:
12.7 x 68 mm ... only 1.95 mm difference in designation.
This one is in a Winchester, but a Mauser is in the works.
Close enough?
Well, the case length is the same ...

And hopefully sometime next month I'll have a matching reamer and gauges in .423 caliber.

the 10.75x68 handles the 400 gr. Woodleighs with aplomb..All the Aussies use that combo on those big Asian buffalo that are larger than the cape buffalo...At 2150 FPS in the 10.75 it kills big time, even on elephant, it is duplicating the 450-400 and that is no slight praise and cannot be challanged.

Lb, did you have to bring that up, It still greives me to even think about selling you that wonderful Hoffman rifle.

If I am not mistaken CEB is also making BBW#13 solids and NonCons in this caliber.

If anyone wants to give them a whirl.

Maybe a 10.03 x 68 mm aka 398 Lapua Magnum?
That would fit nicely in a Mauser with box lengthened to only 3.5".

Ray,
you are missing my point.. i KNOW the round can handle 400 gr bullets, however, the chambers aren't setup to allow for them to be set at the crimpgroove ...nor are the dies

MINE are setup to all that

quote:

Originally posted by Atkinson:
the 10.75x68 handles the 400 gr. Woodleighs with aplomb..All the Aussies use that combo on those big Asian buffalo that are larger than the cape buffalo...At 2150 FPS in the 10.75 it kills big time, even on elephant, it is duplicating the 450-400 and that is no slight praise and cannot be challanged.

Ray, I'm a little confused by your statement here as in another thread when you and I and others were discussing 404 ammo (404 Jeffery ammo? Please help) you called the factory 404 ammo with 400 grain bullets at 2100-2200fps "so damn weak" that you would not use it, preferring loads up around 2400fps.
It has occurred to me that maybe you and I were talking about two different things, where I was thinking in terms of 400 solids which at 2100fps have all the penetration ever needed on buffalo and elephant where you may have been talking of the effect of higher velocity with the soft nose bullets. Here I freely concur with you that with soft nose, the faster the better in terms of shock effect and damage on animals provided the bullet is up to it.

My own experience on the big Aussie buffs was almost exclusively with solids although I think I did use a couple of Kynoch softs in the mix somewhere, based on the empty cases I returned with.

Getting the 10.75x68 up to 2150fps with either solid or soft nosed bullets will as you say, "kill big time"

Mahillon 10.75x68 on www.traderkeith.com

Today, I made a new photo of my rifle, with the installed new trigger.


About 400grs bullets. I never tested 400grs bullets in my 10,75x68. I mean, this round isn´t made for this heavy bullets. Within the CIP max. pressure, you can get only ~2100fps. The case is to small, to hold enaugh powder for the 400grainers. The 347grs /350grs bullet is perfect for it. 2300fps are possible.
But only my 2 cents.

Martin

Eagle 27,
You are correct, I was talking about the 400 gr. Woodleighsofts and how well they work at 2400 FPS. The solids work at either velocity and as you apparantly know a solid works at about any reasonable velocity, and in fact it sometimes seems to me they work better at reduced velocity as high velocity may very well impede penetration with a solid. I have never made my mind up on that point, but I have seen some slow solids do some awesome penetrating such as in the 7x57 and those calibers that handle long for caliber bullets at slow speed.

That said, I have no problem with 2100 FPS in a 10.75 or a 404 Jefferys, they kill buffalo quite well, but the 400 gr. expanding bullet at 2400 FPS is more powerful and seems to kill much "better" which doesn't come as a surprise to me. therefore I prefer the 404 but would never hesitate to use a 10.75 on anything..I prefer bullet construction and good shooting to caliber or any thing else..I have hunted DG extensively with the wonderful 9.3x62 without complaint...Sorry for the misunderstanding...

Jeffe,
I suspect that depends on who built the gun and how it was set up...However, I have not had such a problem with the 10.75s that I owned that were not custom rifles..The Hoffman I sold LB-404 I reloaded for it without a single problem..Crimp groove? They are seldom in the right place anyway in any caliber..I seldom even bother to use them except on the very largest of big bores..Also remember that unfortunatly the magazine on most rifles determines where you seat the bullets as most factory rifles have short magazines and long throats..What I'm saying is these things have to be dealt with on a gun by gun basis..

The best alternative to your problem, short of gunsmithing, is to turn your expander ball down .003 or so to snug up the bullets, use a powder that fills the case with a tad of compaction, and go hunting, then you won't need a crimp in the 9.3x62, .375, 450-400 or the 10.75x68. As to the throat, its not important on a 50 yard buffalo gun IMO, but you can always run a reamer in it to make it fit the magazine or lengthen the magazine to fit the throat, whichever works best.

You always have options.

Ooops, I was talking in alternatives, I realize your gun is already set up and that's fine and I'm sure it works great, but I think you still have the option to use 400 gr. bullets if you so desire..the problems I have seen with bullet set back in the magazine have all come from leaving one of the down rounds in there too long and firing the top rounds over and over again with that round in the bottom, the constant pounding pushes the bullet back, but I don't crimp my 404 or the 10.75x68, rather I use a powder with a a very light compaction, just bare compacting, I also turn my expander ball down .002 to .004 for a very snug fit, same on my double rifles and have never had an issure..this cannalure thing is just a pain in the butt, its always in the wrong place unless you just shoot one bullet and cut everythig to fit..but to each his own on that subject, both apparantly work.