I have shot a lot of deer with the Nosler BT. Never had a problem and I doubt that there is a better deer bullet. However, If I had to bet my last dollar on a bullet performing, I would bet on the Nosler Partition. To work well on a wide variety of game a bullet must have a nose soft enough to expand but retain enough weight to drive through to the vitals and beyond. Thats why the Partition works. The lead in front of the partition is soft and will expand even a long range when velocity has dropped off. The lead behind the partition is harder and retains the weight it needs to get the job done. No One has really ever improved the design of the partition. Old John was ahead of his time and made a great product. The Barnes TXS bullet is probably the best penetrate and a quality bullet as well.