Truc got them from me so I'll say it's a process but not a real hard one. In fact I think it's kind of neat to start with one case and end up with another. 4 steps if I remember correctly plus the final trim.
1- size 7mm/338 mag in 350 rem mag trim die, cut excess with hack saw and a few quick file strokes to make smooth
2- run through 350 neck die
3- then another neck die to reduce further
4- run through 6.5 FL die
5- trim to final length
Hardest thing for me was trying not to crease the case while forming.
Hope all is well sir!