Thread: 7mm wsm to 270wsm sizing

I have been gifted a batch of Norma brass that is head stamped 270wsm but has been sized up to 7mm wsm, some is virgin unfired and some has been fired once.
With the regaining of my old 270wsm I am keen to reclaim this brass for use in it.
Is it a simple matter of annealing the brass then full length sizing in a 270wsm die and then checking trim length ?
Strangely enough theres heaps of info on forming 7mm wsm brass from 270 or 300 wsm cases but nix info on going the other way