wondering if anyone heard of this. sounds interesting. kind of improved 338-06 no sharp shoulder but nice shoulder and sufficent neck length. i necked the steyr down to 338 and seated a bullet, nice looking cartridge,little shorter case length than 06, any perceptions.

No doubt it would be a good cartridge.....But why?????The whole point to the 375 Steyr was to have a dangerous game cartridge in a short, handy actioned rifle that was "legal" for African use. Just get a 338/06 or a 338 Win Mag if you have to have the 338 bore. Otherwise live large and get a 9.3X74R double.

i could ask why? for two thirds of the cartridges in existence, but i dont. just thinking of new things to spend money on and learn a little on the way.......

I think it would be a damn good cartridge for larger big game, like moose, elk, and bear.

Probably be somewhere between 338-06 & the 338 Mag, probably closer to the 338. Would the long, heavy 250 gr. spitzers take up too much room in the shorter 376 case?

Tod - No, it would not be a problem. All you do is give the seating measurements to the reamer cutter. They will ensure enough throat to maximize the case capacity.

300stw - Like the other replies, I�m not sure that you are achieving any cartridge size or performance gains. Making dies, reamers and fire-forming brass is a huge pain and expensive. I would consider a more mainstream case deign to make your life a little easier. But if you want to wildcat just for the sake of doing it, there is not problem with that. Experimentation, done safely, is very rewarding.

But the 9.3X74R would not be legal in Africa either???

300stw,

I shoot a .376 Steyr. I have also corresponded with the engineer at the Steyr factory who led the design team for the cartridge. It is clear to me that he viewed the case as one they could use as the base to develop a line of cartridges. Remember the MS cartridges? ( built on the 56 mm Mannlicher-Schoenaurer case)

I don't know if Steyr will proceed or not, but since the firm has been acquired by outsiders it has gotten very quiet over there.

My opinion is the current shortage of .376 Steyr brass was caused by all the wildcatters buying it up to use for their projects.

jim dodd

Why would you want to do that, I don't think there is a need for one

It's been kinda done before, in the 338 jamison, which would be 338x7wsm.. ~82 grains of water capacity. The jamison would be slighty shorter and fatter.

Btw, there is no reason to neck down the 376, as I also shoot this as my current "light" rifle... 225gr at 2950, 300 grains at 2500, and lighter than you can expect recoil...

but, since I have thought about a 338x7wsm, I can see your point

fyi, the 7 is slightly longer than the other wsm's to prevent it from being chambered in a 270 wsm.
jeffe