My .308 is a Remington, 1:12 twist. Does well with both the 155 Nosler and the 178 A-Max over Varget.

The 155s worked OK out to 1000 yd at Raton, but not sure if they would be OK closer to sea level. As I have a 26" barrel, they are marginal if your run the calculations (http://www.jbmballistics.com/cgi-bin...j_simp-5.1.cgi ).