I've found good success using Red Dot shotgun powder over any 150-180 lead bullet in multiple military calibers. I shoot 30-06 / 303B/ 7.62x54R/ 7.62NATO/ 7.7 JAP/ 8mm Mauser and I never have a problem with having enough velocity to ring the bell at 100 yards with authority and accuracy.
I'd advocate anyone to google search for any articles written by C.E. Harris. He used to write for the NRA as well as several other Gun Rags in the past.
Bruce