Never, never, ever...
buy brass for a rifle you don't own.
I won an auction for a large bag of 8x68S brass on the cheap. The thought was it can be used to form .35 Newton should the supply of Newton brass ever dry up.
It arrived the other day and it is lovely brass (mostly RWS). Now, I'm Google-fooing the hang out of ballistics, dies, rifles, stories.
Hmmm, there's a spare 1914 action just sitting there in the pile....
Why, oh why, did I do this to myself?