The absolute best loads for my old Tikka Scout 308 were...
100-200 yard paper punching: 44gr Varget, Win brass, Fed 210M primer, 168 AMAX or BTHP, 2.820"
600+ steel: 45.0-45.5gr Varget, Lapua brass, Fed 215M primer, SMK 155 Palma, 2.820" <-- yes, 215M large rifle 'mag' primer
Both...