9.3x62 for 9.3x57 brass

Potashminer said:
Not precisely the same as necking 8x57JS down to 30 cal. 7x57 is about .4294" at shoulder - 1.7277" to bolt face. 8x57 is .4310" at shoulder - 1.8273" to bolt face. Both have same size case rim, I think. Very close, if you see 0.0966" as insignificant case body length difference, but they are / were different to each other.
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I guarantee you can make either case fit the chamber. - dan
 
hoytcanon said:
Nope, the 7.7 Japanese uses .311/
312" bullets... not nearly as practical as .308", particularly in North America.
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Indeed, but bring out a 308x57 and guys would likely be shooting them in a 7.7 Japanese some of them "last ditch" are supposed to be unsafe to fire at all. And, depending on exact dimensions, the 7.7 may very well chamber in a 308x57.

You ever tried to see if a Norma 7.7 Jap round will chamber in your rifle?
 
hoytcanon said:
With that theory we would only have half a dozen cartridges. My reasoning for it's creation was a fondness for the X57 case, and a plethora of .30 cal bullet options. It was odd that there never was a commercial X57 .30 cal cartridge. In addition this nestles in nicely between the .308 and .30/06, and provides a resolution to the age old debate between the two cartridges, although it is closer to .30/06 in performance. As for trouble, it is 8X57 passed through the sizing die, no extra steps to arrive at a cartridge. I am getting 2740 fps with 180 NBT's and Alliant powder and it has a very pleasant recoil cycle. I have taken half a dozen animals with it including deer, bear and moose with excellent terminal performance. I am using PPU 8X57 brass which is easy to come by and inexpensive. I currently have two rifles chambered for 7.62X57, a Walnut Blued M77 Mark II and a Stainless M77 Mark II with Bob Jury barrel. In the picture below top to bottom; M77 Mark II .450 Marlin, M77 Mark II 7.62X57 HC, M77 Mark II .358/375 Ruger, all with Jury barrels, B&C stocks and Leupold scopes.
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Nice trio. I was on an x57 kick for a while, had various 5.6, 6mm, 6.5, 7, 8, 9, 9.3 and 375's on the case. Never a 30 cal though, but I like your reasoning. - dan
 
riversrest said:
Yeah but if we follow your theorie there wouldn't be any affordable guns and ammo out there any more.

I'd still like to see the headstamp on that modified brass.
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Curious, what does the headstamp have to do with anything? It reads what I said it does....
 

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riversrest said:
These cases look different from the reloaded cartridges in "7.62x57" you have posted.
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They are the same load, not the same rounds, the first picture was taken months ago and those rounds trotted downrange... look Bub, you seem to be inferrng something here, but I can't make head nor tails of it, so instead of this dance around the mulberry bush, why don't you just speak plainly.
 
All I said was "These cases look different from the reloaded cartridges in "7.62x57" you have posted."

What is my "inferrng something here" in that and how more plain can it become in your opinion?
 
dan belisle said:
How do they "look different"? Agree with Hoyt, you seem to be implying something. - dan
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He's a weird one... had him on ignore until he got quoted on this thread, heading straight back to that list... I don't think any visuals will convince an unbeliever, but.... let's see if this message gets across...
 

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Well, perhaps back on track here fellas.. making some 9.3x57 brass out of 30-06 Winchester today.. seems to be going quite well. No split necks so far.. trimming the 30-06 down to 57 mm, running through the sizing die 1 full rotation back, in proper place. Next step will be trimming them back down and resizing again. Things seem to be going quite well.



 
Hmatt - perhaps you will want to run some of those through your rifle, without bullet, powder or primer - you will want to get the brass to fit to that rifle's chamber, not necessarily just to that die. There has been postings above how to do that - too long, too long, then just barely long enough - is not a good thing to go too short, by very much.

Then set a bullet without powder or primer - you will want to make sure they chamber - not that the neck walls are too thick for that chamber.

Almost always better to try one or two, before you make a whole pile, and none will fit.

Elderly 9.3x57 chambers can be fairly sloppy or worn - may or may not match up to "modern" made dies.
 
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Potashminer said:
Hmatt - perhaps you will want to run some of those through your rifle, without bullet, powder or primer - you will want to get the brass to fit to that rifle's chamber, not necessarily just to that die. There has been postings above how to do that - too long, too long, then just barely long enough - is not a good thing to go too short, by very much.

Then set a bullet without powder or primer - you will want to make sure they chamber - not that the neck walls are too thick for that chamber.

Almost always better to try one or two, before you make a whole pile, and none will fit.

Elderly 9.3x57 chambers can be fairly sloppy or worn - may or may not match up to "modern" made dies.
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Yes, that is on the to do list for sure. , I am going to trim all the 06 brass down to 57 and size them all through first. Then before I go any further with the batch I’ll do some testing with a couple as you have mentioned. Just not at that step yet.

Edit :We have made ammo for this rifle with these dies and had no issues with chambering and pretty not bad Results as I had posted. I’m also matching up to an OAL modified case I have for it.
 
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