Since you don't handload yet it will reduce your choices a bit. I shoot a 7 mag and see no need to go heavier than 160 for game up to moose. Last fall I took a bull moose with a 160 Accubond ( 1 shot ) and 2 pronghorn with 150 ballistic tips ( 1 shot each also ). Wasn't too impressed with the accubond. If I was looking at 1 bullet for everything I would shoot 150 partitions if I hunted deer sized game more and 160 partitions if I hunted larger elk sized game more. All this would also depend on which shot best in my rifle. Make sure you keep all fired brass for that weatherby as it will save you a bunch when you start handloading.