making 30x47 cases from .308 Winchester??

S

sambubba1

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What is the correct procedure for doing this? I have a 30x47HBR which Dave just sent me a new reamer for, but I'm wanting to play with this version also. I know I will probably need another reamer for this version as well as dies. I ran a .308 case through my .30HBR die and it made the case, but I figure you guys know a better way.
 
It can be done but it is a lot of work as the case is so much longer. I made about 5 or 6 and a friend said. Buy Lapua 6.5X47, expand the neck and shoot it to fire form. Very simple. I have some dies I would be glad to unload for the 308 to 30X47. Don
 
Don's answer is a good one. Also an alternate to the 308 brass is the Savage 300 brass available from Sinclair. It is just a few thousands longer than the 30/47 and makes for a lot easier brass prep.

virg
 
don carter said:
It can be done but it is a lot of work as the case is so much longer. I made about 5 or 6 and a friend said. Buy Lapua 6.5X47, expand the neck and shoot it to fire form. Very simple. I have some dies I would be glad to unload for the 308 to 30X47. Don
Click to expand...

Don,

I think you had better go back and do the math. The 30X47 is only 8mm shorter than the .308 case. That is approximately 1/4", not very much. The 6.5 x 47 brass will not do a true 30 x 47 when fireformed, the neck will be short.

Now doing a 30 x 44, like I shoot, out of .308 brass, that is a lot of work. But I find that I only have to make brass once a year, 100 at a time, and it is a good winter project.

FWIW
 
As an observation, people "east of the Mississippi" have more trouble with the small primers. I have no idea why, and it's not a serious scientific study, just an observation of who complains. But these are serious, good shooters.

Also true is those in the Midwest seem to find drilling the flash hole out close to .080 helps. And I've always figured a hotter SR primer could help -- after all, the physical size of the primer isn't the issue.

Not a universal observation, some east-coasters have success with the small rifle primer, and some west-coasters don't. Worse, several Australians have reported issues with small primers in larger cases, with the 6.5x47 being right on the edge. Not sure if they're east or west of the Mississippi...

Then there is David's point that the 6.5x47 Lapua is just a bit too short to work well (with some reamers) when the is neck taken up to .308.

A lot depends on your particular reamer. The "history" of .30x47 means that more than those two numbers can be at play.

For obvious reasons I don't recommend it, but I have a "fixture" that I use with a radial arm saw & non-ferrous blade to shorten up cases -- I have a .30x44, and worse, a couple wildcats of about 2.500 length, based on the .404 Jeffery, which is 2.875 long. Taking off .375 with a case trimmer is just no fun at all.
 
For obvious reasons I don't recommend it, but I have a "fixture" that I use with a radial arm saw & non-ferrous blade to shorten up cases -- I have a .30x44, and worse, a couple wildcats of about 2.500 length, based on the .404 Jeffery, which is 2.875 long. Taking off .375 with a case trimmer is just no fun at all.[/QUOTE]

Charles,

I agree the case trimmer route is a pain. I now do my neck shortening in the lathe with a SHARP single point. Much faster and way easier on the hands.

David
 
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