I know the 378 Weatherby case is a 416 Rigby case with a belt added. Is there such a thing as the 375 H&H (or other belted magnum of that family) case made without the belt?

H. C.

HenryC470--

There's no need for such a cartridge... just turn the rim off any of them. It's much easier to subtract than add.

If you're looking for a cartridge that's close to what a beltless magnum would be, look at the .350 Magnum Rigby. It's pretty close.

There is no such case, but the 8x68S case comes very close. Buy the book "Cartridges of the world" if you are interested in this subject, it has an incredible amount of information, lots of fun for you dollars. Tron

What about the 9,3x64 Brenecke case?

Franz it's right a 9,3 case it's a H&H case without a belt.

Daniel

Daniel
I don�t know why you say the 9,3x64 is a .375hh without the belt. Have you checked the case diameters? According to available drawings the 9,3x64 has a diameter of 12,8 mm at the base and 12 mm at the shoulder. The .375, and all the belted magnums except the large weatherbys, are 13mm at the base, ahead of the belt. So the Brenneke case is definitely not a belted magnum without the belt. It would not be, or should not be, possible to chamber a belted magnum case, with the belt taken of and reformed, in a 9,3x64 chamber. It would be very dangerous to try and reform a brenneke case for a belted magnum chamber. I also checked the drawings for the 8x68S and this case is larger at the base, 13,3mm, than a belted magnum. So it seems that there is no case that equals a belted magnum without the belt, though I have not checked dimensions on the old .300/.358 Newton magnums. Tron

Hey HenryC, Is there a particular reason you want a 375H&H case "without" a Belt?

I've often wondered this myself -- why nobody every made a line of 2.5" wildcats with the belt turned off and the base turned down to match. None of the win mags need the belt like the original H&H's did, as all have fairly straight case walls and decent shoulders.

Todd

TRB The 9.3x64 case has a slightly rebated rim. The actual size of the base is the same as the H&H cases.As a matter of fact I use 458 win to make 9.3x64 cases. It is a simple matter to remove the belt,rebate the rim and then recut the extractor groove. I use a forming die that reduces the case from 45 to 41 cal and then it is once through the FL 9.3x64 size die,load and shoot.

Snowman
According to the "official" drawings the 9,3 base itself, ahead of the rim, is 12,8mm. Maybe you have a generous chamber in yours? Besides, belted magnum cases are notoriously under-dimensioned in my experience. But in theory at least what you do should not work. Tron

I am certainly not the first to do this. RCBS sells the forming dies to convert 338 or 458 to 9.3x64. There is also a company in the US that markets brass for the 9.3x64 made from 458 brass.