Going through my collection of wildcats and found a box of loaded 9.3X38-55. Seems like an odd combo. Anybody have any info on this round. Butch

The case that is based on is essentially a straight walled 30-30 case just to give you a frame of reference. It has been necked down to
a bit above 35 caliber, 9.3 being the European
preference in 35 caliber. There is a wildcat that is similiar and it is the 35x30/30. The
ballistics are similiar to the 35 Remington.

I would GOOGLE for this round and see what you can find on European web sites.

Mr. Elkhunter, you are close. The 38-55 case is .100 longer that the 30-30. I will try the google search. Thanks Butch

seems an odd one.. and one that i would have labeled 9,3x375 win.... unless designed for an old gun.
Elk Hunter, I am not being contradictay, just that you are off on this one.
the text in italiics has been updated - as i was incorrect
the 375 (38/55) share the same brass,

put your calipers on the bullet... this could be funny...


9,3 is NOT the euro reference to the 35 caliber (thats either 8,8 or 9, both of which use .356 not .358) rather a .366 bullet. the 358 win is a 8,8x51 over there.. and a 9x57 uses a .356 bullet.

Sounds like a funny, but a 375 winchester uses the same brass, but with higher pressure sounds like someone had a nice euro singleshot (or barrel) and went to town with a 38/55 reamer

this is more like a round between the 356 and 375 win, either of which are far larger than the 35x30/30 .. which is a rimmed 35 rem


jeffe

I do not have the case length for the .38-55 on hand.
But I think these cartridges will be very close to the .360 2 1/4 Express (English) or 9,3x57R/360 (Continental).

Fuhrmann

Here is some info on the .38-55 with a link to a cartridge drawing: .38-55

Jeffeoso,

You will find that the 38-55 is not related to the 307/356 Winchester rounds. I know the 375 Winchester does not have the same dimensions as the older 38-55. I was trying to give the guy a frame of reference using cartrides that he might be familiar with. I am also quite aware that the 9.3 is not a 358 diameter round. Again I was trying to give the guy a frame of reference he might understand.

I guess I will just keep my mouth shut to avoid inaccurate flames.

Oh, that old thing.
Sure. I have several.
250g @ 1750. Good for any non-DG in NA under 200yd.

quote:

Originally posted by Old Elk Hunter:
Jeffeoso,

You will find that the 38-55 is not related to the 307/356 Winchester rounds. I know the 375 Winchester does not have the same dimensions as the older 38-55. I was trying to give the guy a frame of reference using cartrides that he might be familiar with. I am also quite aware that the 9.3 is not a 358 diameter round. Again I was trying to give the guy a frame of reference he might understand.

I guess I will just keep my mouth shut to avoid inaccurate flames.

Elk Hunter.
Sorry you feel that way. and i researched and found you are correct that the 307/356 is not the same brass. i will update my original post to refect that.

interesting that you "know" the 375 and 38-55 are different diameters... with the exception that the 38-55 is .102" longer, the round are identical, and ALL 375 winchester factory round would fit in that chamber(unsafe). even the boday taper is identical.

Case Diminsion 375 win 38-55
rim .506 .506
Case head just above rim .420 .421
Case length 2.02 2.129
Rim thickness .063 .063


.

jeffe

Jeffeoso,

We agree on the 38-55 and the 375. I have found the 375 brass to be slightly thicker and definitely higher strength than typical 38-55. What I do not understand is why Winchester chose to make the 375 such that it
would chamber in a 38-55. As you noted this is a potentially dangerous situation in an old 38-55 from the days of black powder. I make my 357 Herret brass from 375 Win brass so that I can shoot safe but stout loads in my Siamese Mauser that I built in 357 Herret just for grins. I had the chamber reamer cut to allow for the
slighly thicker 375 brass. I like tight chambers so I do have to carefully allow for the brass that I am
going to use.

There are several places where you can find case or chamber dimensions on the web. Too bad there isn't one central place where all known commercial and wildcat rounds were listed along with warnings about using the wrong ammo in the wrong chamber.

I am surprised that Winchester did what they did with the 375 Win. On the other hand I applaud Marlin/Hornady for doing things like making the belt on the 450 Marlin thicker to keep it from being fired in most belted magnum actions. I have seen people actually try various catrigdes in rifles until they found one that fit and then they tried to fire it. I had one dumb neighbor shot 7-08 in his 308 just because it would fit. The public is very self-destructive at times.

Regards,

OEH