This may be way off thats why iam asking before trying it.

[Rsadams]

I can't find 6mm remington brass for my old 600 remington rifle. I was told that I can resize 257 Roberts brass to use for 6mm remington brass. Is this true? Has anyone tryed it? Sorry if this is common knowledge or a complete falsehood.. Even factory 6mm remington is hard foe me to find local anymore. Thank you for your time in advance....

 

[hogpatrol]

http://www.gunbroker.com/Reloading-Supplies/BI.aspx?Keywords=6mm+Remington

 

[jpretle]

You can neck down 7X57 brass, also. I have neck down many for a 257 AI.

 

[hogpatrol]

There's some for sale on Saubier.com. No direct link but it's at the bottom of the main forum page.

http://www.saubier.com/forum.html

 

[ireload2]

The problem with .257 Roberts brass is it will sell for more than a buck apiece now - if you can find it.
Yes I have formed a few .257 Roberts cases into 6mm and it worked fine.
I had 500 cases that I was going to form but i kept procrastinating.
Eventually about 400 Rem 6mm case came to me in a trade and I sold the .257 Roberts brass.

 

[rmist]

What's the reason for this shortage? I have a 6mm Rem and it's a great round. I know that Remington discontinued it in there line couple years ago. The last one I picked up was a VLS model.

 

[Dusty Stevens]

Too busy making 22 shells and more mainstream calibers. Theyll make another run and hopefully youll get some before theyre gone. Put in a notify me at all your favorite brass suppliers and if its like last year maybe if you hurry you can get a few bags

 

[fguffey]

I have 257 Roberts and 257 Roberts Ackley improved cases with 30/06 head stamps. I have not found it necessary to purchase brass in a few years but when I had the opportunity to purchase 30/06 cases from Pat’s reloading in Ohio for 7¢ to 11¢ each for pull down cases I took advantage of the opportunity.


F. Guffey

 

[Rsadams]

Thanks for your thoughts. I had put in a notify me at midway and got a we are not gona have this item anymore reply from them.I will check that place mentioned above. If it's not there ill just put in a bunch of notify me at different places.. Thank you once again.

 

[jpretle]

I have 257 Roberts and 257 Roberts Ackley improved cases with 30/06 head stamps. I have not found it necessary to purchase brass in a few years but when I had the opportunity to purchase 30/06 cases from Pat’s reloading in Ohio for 7¢ to 11¢ each for pull down cases I took advantage of the opportunity.


F. Guffey

There are 2 configurations of brass one should always have on hand. 308 and 30-06. You can make quite a number of cartridges, from just those 2. Just in case things get 'TUFF'.

 

[fguffey]

My favorite forming die is the 308 W; again, if I had one forming die it would be the 308 W case forming die. My second favorite is the 243 W forming die. I have 308 W cases that were formed from 30/06 cases. When forming 30/06 cases to 308 W military chambers I have not had to ream and or turn the necks.

Then there are 30/06 chambers that are long from the shoulder to the bolt face. For those I use 280 Remington cases; same for wildcat cases that shorten as much as .045” from forming to firing.

F. Guffey

 

[Rsadams]

Ok..lol... This may be the dumbest thing asked all day.. You say forming die is this different that a full length die? In other words if I took the 257 Roberts case and wanted to turn it into the 6mm remington is there a die just for doing this? Or can I just use my 6mm full length die? Sorry to ask ive been reloading for a couple of years now, but never tryed reforming one brass to another caliber brass... Thanks for taking the time to look at this in advance...

 

[jpretle]

Run it through your size die, then check for fit in the chamber. Size it just enough that there is a slight bit of resistance to closing the bolt handle.

 

[fguffey]

http://www.rcbs.com/RCBS/media/RCBSMedia/PDFs/Parts/2014_SPECIAL_ORDER.pdf


In the Special order catalog on page 8 you will find 6mm cases that can be formed from other cases and the number of the forming die sets.

#11565 forming die set for forming 6mm Remington cases from 257 Roberts cases; cost #48.95

#58080 die set forms 6mm Remington cases from 30/06 cases. The #58088 die set cost $336.95.

I do not have that much money tied up in forming dies, I do have forming dies that I use when forming short cases from long cases.

Forming and necking down; the shoulder on the 6mm Remington is 26°, the shoulder on the 257 Roberts is 20°45’, then there is a .003” difference in the distance from the shoulder/case body juncture to the case head between the two cases.

F. Guffey

 

[Brians356]

I speak from recent experience: You do NOT need a "forming die" to make 6mm Rem from 257 Roberts. A common ordinary 6mm Rem Full Length die works very well.
-

 

[Brians356]

#11565 forming die set for forming 6mm Remington cases from 257 Roberts cases; cost #48.95
...

That's not a "die set", that's a single "form and trim" die. It forms the case like a FL die, but also allows you to trim the neck with a file across the top of the die - not a bad way to go, actually, if that appeals to you.
-

 

[Rsadams]

Ok great thank you for your time...

 

[TimP]

Norma's 7X57 Mauser brass. Its high quality brass that works well for the 6mm Rem/AI version just be prepared to do some neck turning.

 

[Brians356]

Norma's 7X57 Mauser brass. Its high quality brass that works well for the 6mm Rem/AI version just be prepared to do some neck turning.

I've experimented forming 6mm from 7x57 recently, first running it through a 257 Roberts FL (which really just necks it down to 25, as the shoulder is the same, but it funnels the neck through nicely) then running the "Roberts" case through the 6mm Rem FL die. And as you state the necks will need to be turned, if they are taken down to .015" it touches the entire neck and then some, and in a SAAMI 6mm Rem chamber, should leave .003" total neck clearance. As someone recently pointed out elsewhere it may be better to neck turn the 7x57 case before sizing it down, to something like .013", as it may aid in decucing donut issues.

OP if you don't want to neck turn, starting from 257 Roberts will leave the necks not much thicker than 6mm brass, and you should have ample clearance without turning. But you will finish up with something of a donut which means you won't want to seat bullets deep enough to run into it.

How many 6mm cases do you need? Even when un-primed brass is unavailable, some 6mm factory ammo is usually still on the shelves. You could always buy a couple boxes of 20 and finish up with 40 cases to reload.
-

 

[Rsadams]

Thats what I've been doing over the years, buying factory ammo when I see it.. I don't shoot the rifle much it was my grandfathers handed down to me. I honestly think after reading this info I will just keep putting factory boxes away for the future and keep my eyes peeled for new brass.. Time is not really a factor here. I thought maybe this resizing would be an easy way to pick up some extra.. Thanks again for the help guys. I found a little gun store awhile back that had some factory,i will just start buying a box a month or so.. Luckly my wife doesn't mind if I keep it under control..lol