I have two guns I am thinking of taking on an Antelope hunt, a 308 Rem. 700 26 inch barrel 1in 12 twist or a Weatherby Vanguard in 243 Win. 24 inch barrel 1 in 10 inch twist. The 308 shoots great with 168 Match Kings but it does not like the 165 Nosler Ballistic Tips I thought I would use. The 243 groups OK with 100 grain Partitions but again I am not sure what to try next. Any suggestions on bullet and powder would be appreciated. I currently use Varget in the 308 and 4350 in the 243. Thanks!