9 Good Reasons You Need To Own a 9.3!

The sizing die can seriously stretch the case that far without splitting the neck? Does it need to be heated? And think of what that would do to my precious supply of 8mm brass...
Would love to try the 57 next to a 62 to see how it feels, should give the same performance if you aren't maxing out the case volume.
 
Deadringer said:
The sizing die can seriously stretch the case that far without splitting the neck? Does it need to be heated? And think of what that would do to my precious supply of 8mm brass...
Would love to try the 57 next to a 62 to see how it feels, should give the same performance if you aren't maxing out the case volume.
Click to expand...

In answer to your question, I have done so, multiple times, with new PPU 8 mm Mauser brass - and also much further - into 9.3x57 Hornady "Custom Grade" dies with elliptical expander ball on the de-capping stem, then further to virtually straight wall cases with .41 Rem Mag expander - then back to the 9.3x57 die and work down until the case just so allows that brass with a "false shoulder" to allow that bolt to close snuggly. So far, I have never had to resort to annealing, but will likely be next stage - what I would do if using previously fired 8x57 brass, and what I will do after fire-forming these "home made" 9.3x57 cases.

It is perhaps surprising to some how far cartridge brass can stretch before splitting - is a thing to make 458 Win Mag brass from 7mm Rem Mag and from 300 Win Mag cases - is often done with that "Cream of Wheat" (COW) technique. I think that works because all have the same belt - what is establishing the headspace - I doubt that would work well for rimless cases, without creating some sort of "false shoulder" to establish head space within that chamber??
 
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mbogo3 said:
There already is a commercial 9.3x54R and a 320gr Sledgehammer bullet for reloaders.
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That I know of, for reloaders, is a relative "plethora" of 9.3 jacketed bullets that were available - 232 grain from Norma, 250 grain Accubond and 286 grain Partition from Nosler, 285 grain from PPU, 320 grain from Woodleigh - is likely others that I do not know about. This is besides multiple cast bullet weights.
 
I picked up a beautiful Husqvarna M46 from a fellow nutter in 9.3x57. It was in beautiful shape. Not drilled or tapped. Former owner had done a bit of bedding on the stock and I relieved the tang a bit more with the dremel. I simply necked up PPU brass in a Hornady sizer die in one pass, loaded to moderate loads and fired. Shot great groups at 50 yards and put up a 3 inch group at 100 yards with the open sights.

I’ve necked up 307 Win to 356 Win in simple passes with no losses and no annealing. If I use once fired brass to neck up then I certainly do anneal. I’ve also necked up loads of 30-06 to 35 Whelen, 325 WSM to 35 Sambar and 308 Win to 358 Win. Neck it up, load it up, chamber and fire. You have a perfect piece of fire formed brass and get to get some shooting and load testing done in the process.

I did have to fireform brass converting 9.3x53 Finn to 9.3x53 Swiss for one of my drillings. Used the cream of wheat method and 10 grains of red dot. You could fireform you 8mm Mauser to 9.3 with the COW method if you weren’t comfortable just sizing and loading.

Anyway, these are lovely rifles that handle well and balance real nice. Light weight and a breeze to carry. Get them while there are still some at these prices….
 
Deadringer said:
The sizing die can seriously stretch the case that far without splitting the neck? Does it need to be heated? And think of what that would do to my precious supply of 8mm brass...
Would love to try the 57 next to a 62 to see how it feels, should give the same performance if you aren't maxing out the case volume.
Click to expand...

I have been necking up surplus LC-69 30/06 brass to .375 for more then 35 years. Don’t recall splitting even one case out of a few hundred. Necking 8mm(.323) to 9.3 should be easy peasy.
 
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