Making PPC brass from 220 Russian.
You will have to do a search for this or go to the 6BR site.
Sinclair has very well written instructions on this. You will have to know the neck dia of the chamber,most chambers for the 6PPC require neck turning.
Anyway after you have fireformed the brass, use H322-28grs or N133-29 to 29.3grs and Berger68gr or Sierra 70 HPBT Match
Bill