Hey yall...i have been loading for a 308 with a 24 inch barrel and a 1:12 twist and recently got a new rifle with a 1:10 twist and a 20in barrel...my old load was 45.7 grains of varget with 168gr seirra tipped match kings and a 2.880 oal ( sitting .010 of the lands) on lapua brass....the new...