I shoot 225 Accubonds in my Whelen, and chose between Re15 and Varget. Either of the two will work really well with that combo. Wish I could say I know 200s and 250s would perform the same, but I stuck with the 225.
My experience: Varget is not as accurate in either cartridge as IMR4895, IMR4064, and H4895. Never jumped on the Varget bandwagon for 308 or 30-06 M1 and M14/M1a loads either. Plain old IMR4895 always proved more accurate for me.