In my previous post, I included a picture of fired (left case) and unfifed cases. Both cases are from Horneber. The unfired cases will not chamber without resizing. I purchased loaded ammo from Safari Arms Ltd in 2009 and these too will not chamber. One pass through a resizing die and then they will chamber.

Does anybody else have this problem with the 10.75x68?

I purchased GO, NO-GO and FIELD gauges from Pacific and the GO does not pass the test. So, I purchased a finishing reamer from Pacific but I'm wondering if trying to finish ream the chamber after 80 years of shooting will work. I'm debating whether to ask Dave Norin to try to ream the chamber when I see him in the next couple of days.

Has anybody else tried somethink like this?

Hello Martin,

you need to set out the 400 grain bullet to an OAL of 84mm instead of the L6 = 81mm, and than you have more powder capacity available as the 416 Taylor with the same bullet weight.

Robert

Looks like a Take Down -rifle in my eyes, especially the fore-end stock.

quote:

Originally posted by Robert:
Hello Martin,

you need to set out the 400 grain bullet to an OAL of 84mm instead of the L6 = 81mm, and than you have more powder capacity available as the 416 Taylor with the same bullet weight.

Robert

Hi Robert,

you compare the 10,75Mauser (3300bar) with the .416Taylor (4400bar)? Hmmm..... You will never get a Vo of 2400fps with an 400grs bullet loaded in a 10,75 Mauser, within the CIP max. pressure.
And, yes, many reloader are using the 400grs bullet with success.
But my opinion is, the Mauser round is made for a 347/350grs bullet.


Martin

quote:

Originally posted by Jgrabow6493:
In my previous post, I included a picture of fired (left case) and unfifed cases. Both cases are from Horneber. The unfired cases will not chamber without resizing. I purchased loaded ammo from Safari Arms Ltd in 2009 and these too will not chamber. One pass through a resizing die and then they will chamber.

Does anybody else have this problem with the 10.75x68?

I purchased GO, NO-GO and FIELD gauges from Pacific and the GO does not pass the test. So, I purchased a finishing reamer from Pacific but I'm wondering if trying to finish ream the chamber after 80 years of shooting will work. I'm debating whether to ask Dave Norin to try to ream the chamber when I see him in the next couple of days.

Has anybody else tried somethink like this?

check the drawings -- the US case to shoulder is longer than the CIP

quote:

Originally posted by Big Bore Fan:

quote:

Originally posted by Robert:
Hello Martin,

you need to set out the 400 grain bullet to an OAL of 84mm instead of the L6 = 81mm, and than you have more powder capacity available as the 416 Taylor with the same bullet weight.

Robert

Hi Robert,

you compare the 10,75Mauser (3300bar) with the .416Taylor (4400bar)? Hmmm..... You will never get a Vo of 2400fps with an 400grs bullet loaded in a 10,75 Mauser, within the CIP max. pressure.
And, yes, many reloader are using the 400grs bullet with success.
But my opinion is, the Mauser round is made for a 347/350grs bullet.


Martin

+1

M

Hello Martin,

My commend was "that you have more case capacity", nothing more - nothing less. I have not compared the working pressure of the 10,75 and the 416 Taylor neither have I said that you can reach 2400 fps in the 10,75 within CIP

You stated yourself: "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 too small, to hold enough powder for the 400grainers."

As yourself has no experience with the 400 grain bullet, I try to point you into the direction how others can achieve more velocity.
A few members of this forum here (myself included) have hunted successful with 400 grain bullets in the 10,75x68 and achieved higher velocity that you think are possible.

Best regards
Robert

I just don't know why you would want to shoot the 400 grain bullets. Taylor dissed this cartridge for lack of penetration but it was the German bullets of the time that were at fault, not the cartridge itself. With the bullets we have available today, it would work just fine with the 347-350 gain bullets.

By golly, I would love to have a gun in this caliber and looked hard to find one. However, I think Ray is right. The only current source of brass I could find was Bertram and I don't care for Bertram brass and it is really expensive. Rumor is that Horneber is in trouble. If you want a .423, it would make sense to simply neck up .416 Ruger brass a bit and build a rifle for that. It would also make sense to simply buy/build a .416 Ruger, .416 AccRel, or a .416 B&M instead. There is a much better selection of .416 bullets and no animal is going to notice the .007 difference. That being said, if Hornady and Ruger would put a .423 Mauser together, I would be the first one at their door.

quote:

Hornady and Ruger would put a .423 Mauser

A Ruger Hawkeye (or #1) chambered for the 10,75 Mauser and Hornady factory ammo? This would be very, very cool.

Martin

If I am going to shoot Buffalo or DG with a 40 caliber then I want the penetration of 400 grs. be it a monolithic or cup and core..The 350 gr. Barnes works great on plainsgame up to Eland, but it will not normally give you two holes on Eland or Buffalo and I personally like an exit hole on everything I shoot. The 400 gr. Woodleigh is my favorite and the Aussies like that combo best on those big bulls. The 10.75x68 is surprisingly popular in Australia, at least where I was..

Here's one for sale.

http://www.simpsonltd.com/prod...3e8aa30d43384f79acb2

The problem you describe is quite common among the 10.75x68s..I have had that problem with several of them..You need to fireform every case in some cases or resize all new brass full length to start with and fireform that..

The old German gunsmith must have run those reamers in until it "looked good"..Even with guns using todays reamers there is disparity.
Its not much of a problem as long as your understand the problem and your post tells me your on the right track..just live with it and you have a great buffalo rifle.

I wish Ruger would build the 10.75x68 in its Hawkeye African and produce ammo for it..It is a great buffalo rifle and one that the Lady or a teen could shoot and still have enough soup for any of the DG...Its a quite remarkable caliber, but I doubt that brass is still available if Horneber is out of business..What a shame.

Everytime the 10.75 comes up I mention that Buffalo arms has cases, made from new magnum brass that have been turned. I bought a batch awhile ago and havent worn any out yet.
I have a b mauser, a comercial FN and my latest, a VZ24 with a 21" barrel with a mann style stock I did myself and love! I use woodleigh 347 for hunting and have used it as back-up on moose. It will penatrate from a quartering away shot into the vitals just fine. I bought my RCBS dies, and chambered the VZ to work with the dies.

That is surprising, and I never considered that approach..I would not have thought that the specs were that simular..Thanks for the heads up.

Theback40,
Is there any way we could get you to post a pic of that Mannicher stocked VZ24???
I'm a sucker for a full stock sporter.

Cheers, John

I got out the mics an apparantly you can lathe cut the belt and rim of the .375 H&H, use a set of case forming dies and make good brass if you are handy at that sort of thing..It would be time consuming but you sure would have a powerful gun with little recoil..I just love the caliber and it kills as well as a 450-400 and at the same balistics and what more could you ask..

I love it when folks that have never owned/shot a particular rifle or caliber chime in on discussions. That is a fools errand. I have owned and shot two 10.75x68 rifles and never had an issue with them. I always full length size new brass when I load it as a matter of record. I tried to buy some Redding dies for that round but got no cooperation from them. Who knows why as I was willing to buy 10 sets of them to make it right. I shoot 350gr. Barnes X bullets when I hunt because they are more accurate than the North fork 340gr. and the Woodleighs in my rifle. I also shoot the North fork 380 CPS&FNS in that rifle. I load to 3.32OAL on all of the bullets as that is what feeds best in my rifle. I get 2350f/s out of the X bullets and 2250f/s out of the North forks. I have some of the Moly-coated bullets from RSA(GS Custom) that shoot faster by almost 100 f/s , but I am saving them for an African hunt as I only have 300 of them. I am not concerned with the pressure I am running as my Orberndorf action-ed rifles can handle 308, 270, and 9.3X64 pressures just fine. The Horneber brass seems to last forever. The same 50 rounds I set aside for load development still have tight primer pockets, and no signs of case head separation after more than 10 loadings. I practice with a bunch of Hawk bullets I bought years ago. Don't think I would hunt with them but they are fun to shoot. A friend of mine shot a Buffalo in Texas (American Bison) a frontal shot inside the left point of shoulder and exited ahead of the right hip. Pretty good penetration for a 350X in my mind. That is the largest animal I know of that this rifle has taken. Not proof positive but more than acceptable in my mind.

quote:

Originally posted by Atkinson:
I got out the mics an apparantly you can lathe cut the belt and rim of the .375 H&H, use a set of case forming dies and make good brass if you are handy at that sort of thing..It would be time consuming but you sure would have a powerful gun with little recoil..I just love the caliber and it kills as well as a 450-400 and at the same balistics and what more could you ask..

Now why did you have to go and tell me that? Here I was perfectly happy with my battery as it is. I've got everything covered from ground squirrels up to pachyderms. I don't need another rifle, especially one in some weird caliber and you go and tell me how to make 10.75x68 brass out of .375. Now you've got my interest peaked. I may have to start looking for one to play with myself. Sheesh!

Sarge,
I'm with you on that, I gave up on the 10.75x68 because of brass problems and funny chambers, but I always just was mezmorized by the caliber as it didn't loosen my molars and it killed as well as anything I have used, at least on stuff up to and including buffalo and Eland, and I would not hesitate to shoot an elephant with it with any good solid..Like Lb 404 I like the 350 gr. Barnes X and the GS Customs bullet even better, but those north fork cup point bullets sure do suit me for about anything..

Now that I discovered you can make brass out of 375 H&H, looks like I'm gong to have to build another one..

* Sigh!! * Well, tell me what components you plan on using. I got three new guns to play with this year and used up entirely too much of my play money but I suppose just one new one next year won't hurt too much. Is the cartridge short enough for a standard length M98? I refuse to use anything else.

quote:

Is the cartridge short enough for a standard length M98?

#

Yes.
OAL: 81mm

Martin

Excellent! Thank-you, I guess. Now I need to go looking for a good M98 action . . .

There was a 1909 in classifieds for $375

I have never had a problem with the caliber and have shot nothing other than the 400's. I do, however, have a problem with Bertram brass

My first post on this forum so be gentle...

I have 3 rifles in this cal, (Mannlicher, ex mil Mauser, Zastava 98)and friends that have a Shultz & Larsen and one made up on a Vergurio action

We have all found the H H headstamped (Hornber?)new brass to be very tight to chamber,(sometimes imposible to chamber)even after going though my FLR die, screwed well down against the shell holder.

Have found that putting these cases through a 458 Win Mag FLR die, (with decapping / expander removed, of course) reduces the shoulder area enough, so that the bolt can be closed, and the cases loaded and fired

2nd time loaded they usually chamber easily...

Cheers
spinna

Spinna,
Welcome to the forum.

Cheers, John

quote:

I do, however, have a problem with Bertram brass

quote:

We have all found the H H headstamped (Hornber?)new brass to be very tight to chamber,(sometimes imposible to chamber)even after going though my FLR die, screwed well down against the shell holder.

And so, I use only brass made by RWS!


Martin

quote:

Originally posted by Big Bore Fan:

And so, I use only brass made by RWS!


Martin

Schade, aber es gibt kiene RWS Hülsen hier zu kaufen. Ich muss immer von Reimer Johanssen bestellen.

quote:

Originally posted by Big Bore Fan:

quote:

I do, however, have a problem with Bertram brass

quote:

We have all found the H H headstamped (Hornber?)new brass to be very tight to chamber,(sometimes imposible to chamber)even after going though my FLR die, screwed well down against the shell holder.

And so, I use only brass made by RWS!


Martin

And you get that where?

spinna,
take a few swipes of a file on your shellbase and size to it. Unless the dies are way off, or the brass is, you should be able to take enough off the shellbase to make them fit without the extra step of the 458 die.

quote:

And you get that where?

I bought the last factory ammo and brass made by RWS in the 90´s. So I have nearly 400 cases for reloading.


Martin

I put a sheet of 220 grt. wet an dry on a glass plate and then polish down the top of my bullet seater, trying the cases every 25 or 50 passes until the case will go in far enough to size the brass. The glass and paper keep things more even and without high spots..A lath even works better, and I have done this on a drill press with ruby stones.

Another alternative is send 3 fired cases from your gun to RCBS and they will make you a set of dies that will work for your gun.

Flash!! Everybody has problems with Bertram brass, its too soft..but probably works with some of the old black powder and old Win calibers, at least for two firings.

A better option to the great little 10.75x68 is probably a 404 Jefferys loaded down or perhaps a 416 Ruger necked up to .423 and loaded down..I have often consider trying to neck up a a 9.3x62 or a 9.3x64 and see where that went. Like I didn't have enough projects..Maybe someone should jack Jeffeoso up on such a wildcat on one of the 9.3 cases. or rag on Hornady until they produce 10.5 x 68 brass. The last alternative is to form a plan to raid Lb404s reloading room....

quote:

Originally posted by Oldsarge:

quote:

Originally posted by Big Bore Fan:
And so, I use only brass made by RWS!


Martin

And you get that where?

Reimer Johanssen

Ray,

I'm curious, what do you think is gained by necking up the .416 Ruger to .423? I was all set on the idea of building myself a 10.75x68 but since a customer commissioned a.375 Ruger I already had most of the components necessary and bought a .416 Ruger reamer as well. The hassle of sourcing RWS brass made this a no brainer to me.

The Ruger duplicates original .404 Jeff loads so it can't be all bad.

I decided I needed something a little lighter than my .416 Rigby and the ruger being built on a Std Mauser action is about perfect.

-Mike

This will sound silly to some, but before I create a project rifle I alwayse buy 500 rounds of brass, have a set of dies and get a set of bottom metal (If a custom). Then have the rifle made. My next project rifle is a 9.3x64 then 404Dakota.The Dakota looks pretty sexy to me in a standard Mauser action!!!!!

Mjines


That is my style of rifle


I love the lines of the old bolt actions

That is about all I am interested in these days.


Cal30

Z1r.
Nothing is gained, just an alternative to having to fireform, and deal with brass problems.

But with such an approach as you suggest, all any of us needs is a .416 Remington, it does it all and does it to perfection..It has no issues..but that would be boring.

All that said and done I plan to make another 10.75x68 down the line. then I can duplicate my 450-400 and get the same balistics as I can get by down loading my 404 Jefferys, What am I thinking! Thats why I sold all 3 of my 10.75x68s in the first place..The only regret I have is selling the that lovely Hoffman to Lb404 but I would have regretted that in any caliber, even a 22 shot cartridge!

I just received the 10.75x68 Mauser cases from Buffalo Arms I ordered after seeing theback40's post above, thanks theback40.
They look good. No head stamp and the cases are trimmed to minimum length, see photo.

I attached a photo of a loaded 10.75 round between a 30-06 and 300 Win. Mag for Oldsarge. It will fit in a standard length M98
but the rails will need to be opened up. I tried several dummy rounds in a 9.3x62 Swedish FN mauser and the last round got stuck
between the rails. I then tried them in a Ruger 300 Win Mag and they fed OK but the bolt head has been opened up for Mag case and won't grasp the case.

http://i32.photobucket.com/alb...ffaloArms1075x68.jpg
http://i32.photobucket.com/alb...MauserComparison.jpg

Sigh! Thanx a lot, guys. Now I'm probably doomed to start another gun project and drive my smith up the wall screaming like I did with the last one. Who is a good source for classic style walnut stocks, these days? I wouldn't put a 10.75x68 in composite. I just couldn't!