As stated in a few replies back and forth, I recall them advertising it as a deer sized animal cartridge bullet, but I think that was in a Field and Stream or Outdoor Life or one of the other advertisement magazines that include two articles for filler. Sorry to hear about your results on an elk with the bullet.

Now as to first hand experience, I have some: This year I wanted to shoot a deer with my cowboy guns, so I opted for my 38/357 Lever Gun. Marlin 357 Carbine to be exact. Had the gun sighted in at 100 yards dead on, open sights with the 357 Fusion's. Ended up shooting a large bodied Mule Deer Doe at 65 yards, shot when right where I wanted, punched the lungs, she went 5 yards and was down. I was VERY impressed with the results. Complete penetration and very decent wound channel, exit. Took one rib completly out and part of a second one as well.

Now about other bullet performance, Using my 338win mag and 225 Barnes TSX handloaded shot a cow elk, complete penetration at 394 yards. Dropped the elk where it stood, rolled down hill 5 yards. Dad shot his with same loads out of his 338, and we actually recovered the bullet in the hide under the skin on the back side. But she went about 20yards before going down. If I can get pictures I will post the pics in a different thread maybe.