Watched a video about month ago. A guy was shooting into steel a steel gong 300 yards. He was measuring which caliber left the deepest divot in the the gong. He shot a 50 BMG, a .338 Lapua Magnum, a .338 Win Mag, a 30'06, a 270, a 6.5x55, a 6.5 Creed and a .243. I'm certain there are calibers I forgot. What I remember is that the 50 BMG won the divot depth, but just shortly behind the 50 BMG was the .243. THe 50 and the 243 penetrated the gong significantly more than the other cartridges. Bullet weight, construction and velocity of each round was not disclosed. Kinda interesting.
