Originally Posted by japple
my understanding was lapua made quality 6mm brass at a good price. Am I wrong?
No you're not, if you can find it.
But remember, it's based on the 57mm Mauser case, so you have many options you can start with and tweak. Like necking down the .257 Roberts or necking down 7x57 etc.
Personally I would go with the Ackley 40* shoulder version.
Once you are done fireforming the case, life is excellent. 10-12 loadings is not uncommon. If you can get .257R +P cases from Winchester the life will be extended as well.
Dies are going to be expensive as they must be custom, but RCBS and Redding make them. I would start at Graf & Sons.
I found my 6.5x.257Roberts Ackley dies in stock there.
As for actions, any mil-surp Mauser action accepts the 6mm easily if you want to do this cheaply.