Both the partition and the BT are great bullets. I belive that the partition is the better of the two for deer sized game. I have used both and never lost a deer. The partition will get you an exit wound more often than the BT as the bullet holds more weight thoughout expansion.

I agree that rib cage shots with the BT offer devistating results. On any of the "marginal" shots the partition may offer an edge of preformance.

Good luck hunting!