Forming 6br from creedmoor?

[Boomer454]

I have a 6mm br that I only have 195 pieces of brass for and it's been fired quite a few times. There a little life left in it but I'm starting to think about replacing it.
I've looked online and found it to be unobtainium, and almost double the price since last time I bought some.

I was wondering what the process for forming it from 6.5 creedmoor wound be as there is a lot of that around.
I did try to run some through the 6br die. What came out looked like a 6 br with a very long neck but there were a lot of wrinkles in the shoulder and even some cracks.
Obviously I have to aneal them. But do I cut the creedmoor to at least closer to length first?
I can worry about neck thickness after I get a reasonably formed case as I'm ure that will be an issue.

Has anyone done something like this?

 

[yodave]

cut the brass down first with a pipe cutter, play with it and get the lengh so close that you don't have to do much final trimming.
I anneal twice during the process and cut 300 pieces of 270 win brass down to form 7mm IMSHA brass because 300 savage brass was fetching a premium price when you could find it in stock. Lapua isn't the only game in town for 6br brass, I've been tickled pink with the Alpha brass I've been shooting, heck you could even get dasher brass and push the shoulder back to BR, a few options out there

 

[Mystic Precision]

Case body brass is much thicker vs the shoulder/neck on most cases. Thinning the brass before forming is a good idea.

Annealing to do the various steps is important

I would just make a 6mm Creedmoor and load to 6BR levels... or a 6GT

YMMV

Jerry

 

[billdick]

Buy an RCBS 6mm br trim die, run in whatever brass you want nice and slow and saw it off with a hacksaw and neck turn it.

 

[Boomer454]

Thanks for the input guys. I should have time to try forming some over the weekend as a test.

 

[dan belisle]

Buy an RCBS 6mm br trim die, run in whatever brass you want nice and slow and saw it off with a hacksaw and neck turn it.

This. Used to make it from 308 cases back when br brass was pretty much nonexistent. - dan

 

[billdick]

This. Used to make it from 308 cases back when br brass was pretty much nonexistent. - dan

Still doing it for my Leeper built 6mm br

 

[Eynhallow]

From what I can gather forming 6 BR cases from .308 is a lot of work. Also, when you do this, will you be using regular or Palma brass? The Palma brass has the small primer pocket....

 

[billdick]

If you have a trim die its not a lot of work. Slowly run it in the sizing die and cut it off, file it square on top of the die, remove it and deburr, neck turn. I'm going to use 6.5 creedmoor next time, federal is making it with small primers. The neighbours kid doesn't reload and has been saving his brass.

 

[dan belisle]

If you have a trim die its not a lot of work. Slowly run it in the sizing die and cut it off, file it square on top of the die, remove it and deburr, neck turn. I'm going to use 6.5 creedmoor next time, federal is making it with small primers. The neighbours kid doesn't reload and has been saving his brass.

That's a good idea. - dan