I think it has more to do with impact velocities than anything. I have some 120's loaded up for my 7-08 but have yet to try them. I have always been a fan of the Honady BTSP. But I shot my first deer with my new 7-08 using 139 gr honady BTSP, not all that impressed, penciled in and out through both shoulders, she did pile up within 15 yds though so I cant complain. I also used them on a hog, busted one leg on entry , 2 ribs and exited through 1 rib, hog went 30 yds.
I am going to try these 120 BT's I have loaded up. I'll let you know results when it happens