in my independent testing,water filled milk jugs @ 50 yds, the 120 bt didn't do as well as I had wanted it to do. I was hoping it to be as tough as the 7mm 120 bt is purported as being,i shall test it when the weather cools off in the fall. I wanted the 6.5 mm 120 bt to work so much I gave it the benefit of the doubt and re-tested it but alas I has cup and core separation 2 outta 2 times. the 125 partition and the 130 accubond did exceedingly well though through my Tikka 260 rem. I guess it all depends on what you want your bullet to do. I personally like an entrance and an exit,with a lot of energy dumped in between, in my deer just in case I have to blood trail at dark 30. the 120 bt is super accurate in my Tikka but I'm leaning 125 partition or 130 accubond at the moment.
good luck on your bullet quest,
Big Ed
