Not a 270win but in the 270wsm 150gr. Power Point traveling 3200fps, was explosive under 300yds. if bone is hit. Had a 4-point mule deer quartering to me at 85yds. I didn't tuck it in enough in front of shoulder. Sounded like like a grenade went off on impact. 4" hole with no exit. Scrap metaled the lungs and heart.
