The "softest" with best expansion have been Rem. 240 gr.
Wvhitman has far more experience with this bullet than I do. I have only taken one deer with it but I was very impressed with its performance. This doe was shot at 70 yards using my 5" 44 mag BFR and a 240gr Remington SJHP over W296. The damage to the lungs was impressive. On the rib cage shot the entrance hole is on the left.