Since the 308 Win has been necked up to 9.3 mm without any other change,I'd like to know if the 30/06 has been ever modified in the same way.

Maybe not,since there are the 9.3 x 62 mm and the 375 Whelen around...

I have a New Model Mannlicher that appears to be that. It was most likely a 9.3x57 to start.
It would seem that rechambering to 9.3x62 would have been to simple solution to someone's desires.

Perhaps the available reamers at hand made the choice to rechamber with a 30-06 reamer with an appropriate pilot for the bore, then open the neck up for the 9.3.

It was originally thought that the rifle was a 9x57 rechambered to 35 Whelen. but chamber cast and bore slug dimentions prove otherwise. No signs of a rebore from 9mm to 9.3mm.
I'll have to look at the barrel markings again on the bottom near the breech. Can't recall what they were now.
I found no info that these early sporters were offered in 9.3 but anything is possible I guess.

quote:

Originally posted by Pivi:
Since the 308 Win has been necked up to 9.3 mm without any other change,I'd like to know if the 30/06 has been ever modified in the same way.

Maybe not,since there are the 9.3 x 62 mm and the 375 Whelen around...

Interesting - what is the 308 Win. necked to 9.3 called? Any further details on this?

As far as the 30-06 case being necked up, the 9.3x62 and the 9.3x66 Sako probably come the closest.

2152hq

could it be simply chambered for an obsolete german cartridge? German used a 63 mm case very similar to te 30/06 in the past,and necked it up and down to the most common calibers. The most common was the 9 x 63 mm


pinotguy

I asked Charlie Sisk what 9.3 mm wildcats reamers he has in stock.He said " 358 Win necked up to 9.3 mm" , no info about the name.Since the 358 Win is simply the 308 Win necked up,the 9.3 mm version can be considered as a necked up 308 Win

quote:

Originally posted by Pivi:
2152hq

could it be simply chambered for an obsolete german cartridge? German used a 63 mm case very similar to te 30/06 in the past,and necked it up and down to the most common calibers. The most common was the 9 x 63 mm


pinotguy

I asked Charlie Sisk what 9.3 mm wildcats reamers he has in stock.He said " 358 Win necked up to 9.3 mm" , no info about the name.Since the 358 Win is simply the 308 Win necked up,the 9.3 mm version can be considered as a necked up 308 Win

@pivi,

ALL necked up from 6mmNormaBR, 308Win,300WSM,338LapuaMag........

Best
2RECON

PS: 9,3-300WSM simply outperforms 9,3x64Brenneke. 775m/sec, 285grs.Nosler Partition,25,5"BBL using LESS Powder and LESS Pressure..........

2Recon,

greetings from an Echo 51st LRRP.

Have you had feeding issues with the 9,3x300WSM?

Rich
DRSS

2RECON,
so the 6 mm Norma BR necked up should be quite similar to the 375 Whisper.Was it intended for subsonic velocities?

The 30-06 necked up to 9.3 would be a 9.3x63. There was a 9.3x63 Miller & Val Greiss also known as a 9.3x63 RWS but the case was a hair fatter than the 30-06. The 9.3x62 Mauser is probably the closest.

For .308 necked up to 9.3 look up 9.3x51 PDP.

quote:

Originally posted by Pivi:
2152hq

could it be simply chambered for an obsolete german cartridge? German used a 63 mm case very similar to te 30/06 in the past,and necked it up and down to the most common calibers. The most common was the 9 x 63 mm

It headspaces on a 30-06 gauge and in the chamber cast (cerrosafe) you can see a very faint line in the neck portion were a 57mm case would have extended too. I assumed that the old 9.3x57 chamber ended there and the new 9.3 neck of the 30-06 chamber was extended. A slight difference in the diameters of the old neck and the new tool left the faint line.

You have to hold the chamber casting at the correct angle to the light to see the line it is so slight, but it's there.

A previous owner of the rifle was shooting 35 Whelen in it as that was what he was told it was chambered for. Oddly, a few rounds of 9.3x62 came with the rifle but they do not chamber.

Supposedly the rifle came down from Canada to the US in the late 50's or early 60's. That's the story anyway,,and maybe is just that (there's always a story isn't there).
But it's been used and hunted with for sure and maybe someone wanted a bit more power for the game up there.

30-06 to 366 IS the 9,3x62 (its the 64 with the larer casehead) 7.62x63 shrinks when necked out

308 to 366? interesting, except smaller than 9,3x57, for no gain .. make x57 from 30-06 brass and have high pressure brass ...

my first answer was to the question "Has the 30/06 ever been necked to ..." and the answer is yes

Yes,I know that,but to form the 30/06 into the 9.3 x 62 mm you need fireforming,the shoulder is higher and shoulder diam is bigger.

Actually the wildcat 9.5 x 62 mm is identical to the 375 Hawk Scovill.The difference between those rounds is so minimal that they could interchange without problems. They only differ for the neck length but even the shoulder angle is about the same

quote:

Originally posted by Idaho Sharpshooter:
2Recon,

greetings from an Echo 51st LRRP.

Have you had feeding issues with the 9,3x300WSM?

Rich
DRSS

Hi Rich,

NO Problems........
Testrifles (so far) blueprinted HOWA 1500 with 20"+24" Lothar Walther Barrels, Standard 1-12" Twist,Redding makes Dies. Best Groups so far 250grs RWS TUG, and 285grs.Nosler Partitions, both between 1/2" and 3/4" 5 shots at 100 Meters...:-))

Best
2RECON

quote:

30-06 to 366 IS the 9,3x62

actually it's not quite....close however.

I have little doubt that one can make passable ammo for a 9.3 X 62 using .30-06 brass.....but the 9.3 X 62 definitely is not a necked up .30-06 case!

quote:

my first answer was to the question "Has the 30/06 ever been necked to ..." and the answer is yes

Fully agreed.....the .30-06 has been necked to everything under the sun from .224 to .416

It is possible and quite easy to form 9.3 x 62 cases from 30/06 .But you have to fireform them since the shoulder is higher and shoulder diam is greater on the german ctg.
There could only be a problem due to the head diam.The 9.3 x 62 head is about 0.005" larger than the 30/06....on measured samples!
According to SAAMI maximum head diam on the 30/06 is greater than the 9.3 x 62

MAX head diam SAAMI:

30/06 , 25/06 , 308 Win , 270 Win , 280 Rem..:
12.01 mm

9.3 x 62:
11.95 mm

I have quite a few 25/06 and 270 Win samples in my collection whose head diam is greater than my S&B , Geco and RWS 9.3 x 62 samples