i've got a grand sample of one instance with the 150 bt outta a tikka t3x in 308 win on a 170lb whitetail cull buck at around 100 yds broadside behind the shoulder. it left not 1 but 2 exit holes which lead me to believe that the cup and core separated. it was still a win but if a less than perfect shot who knows. i have since went to 165 bt's due to heavier build. i haven't shot one to eval yet tho.
Big Ed
