I can see that 120gr being an excellent choice.Well I don't hunt Whitetail, but do Muley's in my state and with the lead free ammo we must use on game I shoot the Barnes 120 SSTX BT. Five muley's fallen to that bullet with one shot kills, placed in the lung/heart area and not move further than 20 yrd after the hit, some dropped in their tracks. It flat out works for me anyway. Range of those deer have been from about 80 to 250 yrds.