S.D. as guide for working up reloads
Pressures in the 7x57 'family' and 30-06 'family' vary from 270 Winchester levels to 257 R levels, maybe more.
Is it feasible/wise to use the S.D. of a cartridge in one of these family's in the other cartridges of that family since case capacity will be virtually the same?
examples -
270 Winchester cartridge for lower pressure 35 Whelen?
244 Rem for 257 R?