What is your point? In WW1 people got hit by shells weighing dozens of pounds with energies over 10 times any shoulder fired big bore and lived. Most mines only get the limbs since they are planted in the gorund, plus the buck coming out of them is not nearly the same velocity, etc. That's like asking why your cape buffalo doesn't die after shooting it repeatedly in the legs with your rifle? Shot placement is a factory to consider. If I can down a big hog 500 lbs. + with buckshot, it ought to tell you something, eh? So calm downa nd wait for me to accomplish what I have set out to do. I still have a hard time believing about the dog, musta been fractional hits which didn't hit any vitals will the second shot which killed him.

From Squirrel to Elephant, the Shotgun is your gun.