Casing, the Accubond is designed to get the same expansion and weight retention as the Nosler Partition, but in a more aerodynamic package.
IMO you are going the wrong way with a 150 gr 30-06 bullet. If you really want to "hammer" a Whitetail then try the 200 gr Accubond. Every 30-06 I have reloaded for loves it. Used to use 60 gr RL22 but have found a load with better accuracy and higher velocity with RL17
Work up to this load in your rifle like I did in mine, i.e. start lower
You will get way better penetration and a much better chance of an exit for bloodtrail.