Yes, the final coup, in the RIPoff Line of nonproprietary easy wildcats, and I did it several years ago. My recipe:

CZ 550 Magnum action instead of Dakota 76 African: The economy model.

New barrel is best, as the .375 H&H barrel of a CZ will not clean up the the neck/shoulder juncture, since the .375 H&H has a sub-caliber length neck. However, setting back a .375 Factory barrel by one thread or cutting off all the threads and rethreading may be considered.

Chamber for .375 RUM.

Open bolt face a wee bit to fit .404 Jeffery rim, if not enough clearance in the bolt face already.

Throat the chamber like the new 2001 .375 Wby. This allows the use of any bullet loaded to 3.75" COL, just like Saeed does with the Walterhogs, a very long-nosed bullet.

Neck down the .404 Jeffery to .375 and fireform. Use standard .375 RUM dies. Trim to 2.840", max 2.850".

Load .375cal/300gr TSX, NF's, or GSC's (all can be seated out to a long-nosed COL to fill the Rigby length box).

KISS Principle: Very important to use 300 grain bullets loaded to 2700 fps, or why not an even 5000 foot-pounds at about 2740 fps? Pressure is not excessive. The longer throat and longer COL reduces pressure compared to the tighty-whitey .375 RUM.

You can still use .375 RUM brass and even leave the rifle marked as .375 RUM.

However, you will have the option of superior function and ballistics, and be able to engrave the barrel:

".375/404 Jeffery (RIPoff)"
and might as well add
"9.5x73mm Expert Magnum (RIPoff)"

This tops the obscure 9.3x70mm Expert Magnum handily.

The RIPoff Line Chronology:
***************************

1) .510/460 Weatherby RIPoff: A 500 A-Square with 30 degree shoulder (instead of 35 degree) and special throating. Formerly known as the .510 JAB, 1998 design.

2) .375/404 Jeffery RIPoff: as above, 2002.

3) .458/338 Lapua RIPoff: 2003

4) .375/338 Lapua RIPoff: 2004
(Actually this is the "9.5x69mm Tornado" done by the Germans in 2001, same cartridge, except mine is highly distinguished by having a 2001-version .375 Weatherby throat.)
Here is the .375/338 Lapua RIPoff:


5) .423/338 Lapua RIPoff: 2005

6) .308/300 Lapua RIPoff: 2005
(This one has the latest 300 Weatherby throat.)

7) 500/470 Mbogo RIPoff: 2006

8) 45/404 Dakota RIPoff (Last of the RIPoff Line): 2006

************************************************

The Super Eight: The culmination of eight years of feverish wildcatting.

I thought the .375 Lapua was my own, but found the Germans had beat me to it.

I was shocked to hear that Dakota had shortened my .423 Lapua and called it first the .423 Dakota-Lapua, and then shortened the name, as well as the cartridge, to simply the ".423 Dakota." They could have done better!

Recap in shorter designations for simple and clean headstamps on brass some day:

308 LR
375 JR
375 LR
423 LR
45 DR
458 LR
510 WR
500 MR

The nonproprietary promotional cartridge board shall be revised. It will be a very rare collector's item. Until then:

May the Farce be with y'all.

My big bores are big boring, what?

Perhaps you misinterpret the silence? It is human nature to look for what they can criticize, no? There are no flies on the RIPoff line. Therefore no controversy. Boring maybe, but in the best possible way.

I believe I have come to covet the 500/470 Mbogo RIPoff. Hurry up and build one, will you!


Cheers,
Canuck

quote:

Originally posted by Canuck:
Perhaps you misinterpret the silence? It is human nature to look for what they can criticize, no? There are no flies on the RIPoff line. Therefore no controversy. Boring maybe, but in the best possible way.

I believe I have come to covet the 500/470 Mbogo RIPoff. Hurry up and build one, will you!


Cheers,
Canuck

Canuck,
Flattery will get you everywhere.
Brilliant response!

I won't let you down there. It's in the works, but the RIPoff smith had to take a second job as a mechanical engineer at the Remington Arms R&D facility in Elizabethtown, Kentucky. No shit.

Bear with us. the 500 Mbogo is incubating.

quote:

Bear with us. the 500 Mbogo is incubating.

Cool. Since my "gun fund" is in intensive care until Africa is paid off, I can wait. Once you've got one up and shooting, and assuming it works out as good in practice as in theory, I think I will give Mr. Leeper the nod to get started. I've alread set aside a couple dozen Jamison Mbogo 470 basic brass.

Cheers,
Canuck

Left to Right (with spherical distortion due to lens):

1. Norma .416 Rigby brass necked up to .475 caliber.

2. Quality Cartridge 470 Mbogo

3. Jamison 470 Mbogo basic brass necked to .510 caliber, after a pass through 470 Mbogo sizing die.

4. Same as 3.

5. Norma .416 Rigby necked up to .510 caliber, after fire forming in 470 Mbogo rifle.

6. Same as 5.



The Jamison brass is about 2.955" long.
The max 470 Mbogo brass length is about 2.945", eh?
The fire forming and necking up of the Norma brass shortens it a bit.
Someday we may have 3.000" 500 Mbogo brass.

quote:

Originally posted by RIP:
Left to Right (with spherical distortion due to lens):
:

And here I was thinking you had a bit of runout.

quote:

Originally posted by RIP:
My big bores are big boring, what?

'Nah .. heh, i just get confused to easy!!! Sometime next year we'll have the 500/470MR, and then I might even get the 500 AR off the ground.

need to get moving today, running late
jeffe

quote:

The Jamison brass is about 2.955" long.
The max 470 Mbogo brass length is about 2.945", eh?
The fire forming and necking up of the Norma brass shortens it a bit.
Someday we may have 3.000" 500 Mbogo brass.

Love it. The short neck on the 416R brass is not so aesthetically pleasing as the others.

The Jamison brass is definitely the best option of the existing ones. 3.00" would be the ultimate should it happen. Best to keep otions open, eh?

Cheers,
Canuck

Canuck,
I am having the chamber cut to 3.000" long, if my brass is 2.955" then I will probably never need to trim it. If I ever do get full length brass, then trim to length will be 2.990".

Jeffe,
Hopefully it will be done before the end of this year. Keep up the good work on your new "hammers."

quote:

Originally posted by JAL:

quote:

Originally posted by RIP:
Left to Right (with spherical distortion due to lens):
:

And here I was thinking you had a bit of runout.

That would be some really bad runout, but thankfully not.

quote:

Canuck,
I am having the chamber cut to 3.000" long, if my brass is 2.955" then I will probably never need to trim it. If I ever do get full length brass, then trim to length will be 2.990".

Poifect. All options open.

Cheers,
Canuck

quote:

Originally posted by Canuck:

quote:

Canuck,
I am having the chamber cut to 3.000" long, if my brass is 2.955" then I will probably never need to trim it. If I ever do get full length brass, then trim to length will be 2.990".

Poifect. All options open.

Cheers,
Canuck

LOL

I did the same on the ARs!!!

jeffe

quote:

Originally posted by jeffeosso:

quote:

Originally posted by RIP:
My big bores are big boring, what?

'Nah .. heh, i just get confused to easy!!! Sometime next year we'll have the 500/470MR, and then I might even get the 500 AR off the ground.

need to get moving today, running late
jeffe

are you making a 500 mr too???

quote:

Originally posted by RIP:

I won't let you down there. It's in the works, but the RIPoff smith had to take a second job as a mechanical engineer at the Remington Arms R&D facility in Elizabethtown, Kentucky. No shit.

Great and AWESOME!!!!! Maybe you can straighten out those idiots, especially in the QUALITY category. That's coming from an EX-Remington man.
I'll take a Sendero II in .375 Ultra, or maybe a .338 Ultra......and THANK GOD they lost the stupid J-lock!

WR,
They won't listen to me. I am anonymous. If they tell me anything about the skunkworks in E-Town, they have to kill me. There is hope of infiltration of common sense. At least they are starting to carry the Yugoslavian commercial Mausers as the Remington 798.

I do not expect Remington to pick up the .338 Lapua wildcat RIPoff line, but it is theirs for the taking.

First we gotta see if they are going to make the .338 Lapua Magnum in some form. That has been rumored.

quote:

Originally posted by RIP:

First we gotta see if they are going to make the .338 Lapua Magnum in some form. That has been rumored.

Maybe that is why they did not offer the Sendero II in the .338 Ultra?!? I hope they beef up the action a bit, as the bolt thrust from a .338 Lapua is quite a bit more than the .338 Ultra.

quote:

Originally posted by RIP:

There is hope of infiltration of common sense.

You definitely seem like a good fella to help in that department!

There is of course also the 9.5X73mm Miller-Greiss Magnum designed in the 1910s by necking down the 404 Jeffery to .375......It never caught on, but you can find a description in Cartridges of the World...


Corrected

quote:

Originally posted by 333_OKH:
There is of course also the 9.3X73mm Miller-Greiss Magnum designed in the 1910s by necking down the 404 Jeffery to .375......It never caught on, but you can find a description in Cartridges of the World,

Wrong-o. You mean 9.5x73mm Miller-Greiss Magnum from about 1910 to 1920, as COTW claims.

Saeed ripped off that one. We have known about this for years and no one has ridiculed him for it.

9.5 not 9.3.

It is indeed and interesting cartridge idea, but how different, other than caliber, than the 9.3?

333_OKH,
You are excused. I started this off with a fictitious 9.5x73mm Expert Magnum.

The real ones:

9.3x70mm Expert Magnum
and
9.5x73mm Miller-Greiss Magnum

They don/t differ by much, eh?
Same parent case (.404 Jeffery).

My two RIPoff cartridges in 9.5mm or .375 caliber are on different cases:

.375/.404 Jeffery RUM-RIPoff (9.5x73mm)
.375/.338 Lapua-Tornado RIPoff (9.5x69mm) (fatter and shorter case, .416 Rigby case head)

Details of the 9.3x70mmEM versus the 9.5x73mmMGM shall be left to lawndart, the resident EXPERT in the Expert Magnum.

The Germans did a straight .375 Neck up of the .338 Lapua Magnum to create their 9.5x69mm Tornado in 2001. My RIPoff is a RIPoff of a ripoff.