Just got off the phone with Nosler technician about the partition, his response was don't use the 150 gr partition on small, light weight WTs. The 150 is a rather tough bullet designed for heavier deer or elk. He recommended 140 bts or his 2nd choice the ,140 Accubond. The 150 will kill but a lack of animal body mass will cause the bullet to not expand as designed, which is approximately 2 times bullet diameter.