The #65B 308 Cal .308" 180gr PP SN and the #65D 300 Win Mag .308" 180gr PP SN are made from the same jacket. The difference is the ogive (or nose profile). The #65B 308 Cal is longer in ogive to suit 308 Win and 30/06. The #65D 300 Win Mag has a shorter ogive for 300 Win Mag and all 30 Magnums including 308 Norma. The #65D 300 Win Mag also has a smaller tip, is slower expanding and has a higher ballistic coefficient.