i've used Rem brass in my edge and i'm on my 3rd batch of 50 pieces. you get about 5 shots with the ones you don't cull. i paid almost $4 apiece for the RWS stuff and it will be cheaper brass because you can wear out a barrel with 50 pieces. not to mention brass is one of the key components in accuracy. RWS brass is probably used by more benchrest shooters than any other. there's a reason for that.
as far as the fireforming, i have a detailed process to do it with cornmeal from one who formed RWS into a cartridge very similar to the edge. i'm gonna try it, if it's a bust i'll post my results. seems like something interesting to do.
as far as neck turning goes, i have to do it with Rem brass, not much of a change there.