I shot a big Elk last fall with Winchester Supreme Accubond 180 gr .300 WM. The slug went through the shoulder (broke the upper leg bone in two), then it took out both lungs. The Elk lurched and went between 25-30 yard, rolled over and never moved again in 30 seconds.

I'd say it did every bit of what I expected from it.

Sometimes you get someone looking at the slug and finding a pettle or two of the front tip pulledoff, even though the rest of the slug is intake. They may say the bullet "failed". I'd ask them if they got the big game animal, "at what point between when the bullet entered the animal and it took it's last breath did the bullet 'fail'?"

If thebullet is properly shot and ittakes the animal down dead, it's worked as designed imo.