Hi!

I have heard of a new cartridge called 375 lapua. When browsing on the net, nothing appear?

Is there anybody out there who knows something?

Thanks

Jens,
Just now getting brass ready for one here, dealing with the "dreaded doughnut" caused by necking up .338 Lapua Magnum to .375: part of the .338 shoulder becomes neck, and the bottom portion of the .375 neck is about .004" too thick in diameter for my chamber.

I can seat boat tail bullets (Sierra GameKing) with full bearing surface just above the doughnut and fire form, then inside neck ream and that should do it. Quite beautiful really.

Then I will get custom dies made from the fired brass and dummy rounds with the bullets I want. Redding I plan.

Until the custom dies are ready, I get by with a tapered .30-to-.375 neck expander and modified .338 Lapua and .378 Weatherby dies. I can load beautiful ammo using the 300 grain Sierra GameKing as is (no crimp), from new brass, but need the neck reaming and custom dies eventually. This will allow me to seat with crimp and use longer momometal bulets seated to COL of 3.750" Until then I will be making 200 rounds of once-fired brass. The Sierra GameKings seat to COL of 3.625" for now.

Ed Reynolds of AccuLoad was my source of scant info on the .375 Lapua, also known as the 9.5x69mm Tornado:

[QUOTE]
Ref.
A New German Sporting Caliber, Phillipe Regenstreif, The Cartridge Researcher, ECRA, Leige, Belgium, 1-1-2003, No. 452 p. 11

... The Tornado is the .338 Lapua necked up to handle the 9.5mm bullet.
Designed to be used for African Big game, it comes in a new rifle, the Tornado Magnum Classic, which sports a Mauser 98 action.
[END QUOTE]

It was said to have been introduced by Waffen Jung G.m.b.H.

This a very special and perfect cartridge design.

It will have a water capacity near identical to Saeed's .375/404 and the .375 RUM, but is slightly shorter and fatter.

When you neck up the 2.720" long .338 Lapua Magnum (8.6x70mm Lapua) to .375, you end up with the 9.5x69mm Tornado, which is 2.713" long.

It comes out with a caliber-length neck and 20 degree shoulder semi-angle. Beautiful.

This might be the outfit doing the 9.5mm Tornado (which is of course the .375/.338 Lapua magnum, and nothing more than a necking up of the .338 Lapua, no other changes):

http://www.waffenjung.de/html/magnum.html

I need one of the pictured rifles in .375 Lapua.

It should duplicate 9,53 Saturn ballistics rather nicely. This Jung looks very nice, but hold on to it, or there will be "taifun" at resale time.

Paolo,
The objective with a 9.5mm Tornado built like the one above would be to load it to a low pressure 2700 fps with 300 grainers ... then enjoy the bath one would take at resale time, with a .375 Typhoon on one's hands. Thar she blows!

With modern Bohler or Krupp-Special Laufstahl 380MPa pressure is fine. This rifle might be just the ticket for Baron von Gucci.

Rip,
Here is a thread from another forum that mentions some good approaches, and the best suppliers for tools, for dealing with the dreaded donuts:
http://www.benchrest.com/forums/showthread.php?s=e04adb...9bdc74&threadid=2880
lawndart

lawndart,
Thanks for the info. I have some other research on this, but some interesting contacts there.

I shot the .375 Lapua today.
At 95 grains of H4831SC, it crossed the 2700 fps mark and started putting them in one hole, with 300 grain Sierra GameKings ... making brass. Low pressure.

I need the longer monometals to eat up some of my case capacity, but I will have to get rid of the doughnuts to do that.

I note AGAIN (!) that the .375 Wby is truly the practicality champ for 300 grainers at 2700 fps, and nothing more is necessary.

RIP,
What is the twist of this barrel?

RIP,

Since you have made the 375 Wby your number 1 calibre choice you should have at least one of them in a a Weatherby rifle

Mike

quote:

Originally posted by Gerard:
RIP,
What is the twist of this barrel?

Hi Gerard,
The barrel is a 1 in 12" twist.
Other specs: 25.75" long, and 0.765" muzzle diameter, No.6 stainless, fluted Dan Lilja.

So far, so good. Yes, I have some of your 265 gr and 300 gr HV's horded to try in this one.

Maybe 2800 fps with the 300 grainers and 3000 fps with the 265 grainers?

How would the twist be involved here?

I thought that 12" twist was the only possible twist allowed in any .375 caliber rifle by natural laws of this universe. What could you possibly be getting at?

quote:

Originally posted by Mike378:
RIP,

Since you have made the 375 Wby your number 1 calibre choice you should have at least one of them in a a Weatherby rifle

Mike

Hi Mike,
I have thought about it, but every time I think about it for more than 60 seconds, I start to have nervous twitches and conniption fits, and get paranoid about string halters and gillflurting, whatever that is!

BTW, regarding your reference to my chronographing factory .378 Wby ammo on "your other thread," I looked at my records and found that I got 2911 fps with 300 grainers in my 25" CZ rechambered barrel, and did not even blow any primers! Did not even pierce any primers! No stuck bolt!

Ron,

Here it is at Hendershots, just waiting for you and only $2700US.

http://www.hendershots.net/images/gunroom/DGR-5.jpg

The custom one could be for you with the Titanium Nitride, Kreiger barrel, Desert or Snow Camo stock and all steel bottom metal. $4700US in 378 but I think the 375 Wby would be about the same.

Let's just hope 500 Grains is never forced to own a Wby...it could cause him serious illness

By the way, think of the money you will save by having your 375 Wby in a Wby rifle. It will be jamming every shot or you will not be able to extract the case so you may only get 8 or 9 shots off a year

Mike

RIP,
Every now and again Darth Vader, or some relation of his (Murphy Vader?), builds a barrel that is out of spec. I have measured 375 twist at 11, 13.5 and 14. If it is a Lilja, it is probably what it is supposed to be. I always check twist as it is a more common out of spec dimension than bore/groove dimension. Sometimes one has the good fortune to get an out of spec tight twist on a hunting rifle and it invariably performs better terminally with monos.

Gerard,
I see.
My next 9.5mm Tornado: McGowen chrome-moly 10" twist 23" long and 0.675" at the muzzle.

I will do that one to match the contours of the SigArms Mauser 98 Magnum in .450 Dakota, and make it a switch barrel.

With the Prechtl action it will be at least as good quality as the Baron Von Gucci rifle from Waffen Jung, and less likely to scare off the game animals when stalking.

When I make it back to RSA I'll try to pack light and leave room in the luggage for your "machined copper parts" of proper caliber and weight.

I go now to test a 270 grain .375 cal GSC FN at 2900 fps versus the 300 grainer at 2500 fps.
This will be with 1" of plywood to 7" of water for nine feet.

Also up next is the North Fork .474/500gr CPU versus the .475/500gr FPS, both around 2100 fps.