To bring the "great bullet debate" back to the issue at hand, neither ball nor hyper expansive bullets are going to knock even a 100lb person back a couple of feet by virtue of the energy imparted into the body.
Last year my brother hit a small pig (maybe 70lbs or so) broadside with a .243 Winchester at less than 100 yards. There was no exit as the bullet desintegrated upon impact with a rib.
That bullet, at 100 yards was packing 1,550 foot pounds of energy. A hot .45 ACP load will develop about 400 foot pounds at the muzzle.
To make a long story short, that little pig just dropped like a brick in its tracks. She made for tasty sauage as I recall.
Last year my brother hit a small pig (maybe 70lbs or so) broadside with a .243 Winchester at less than 100 yards. There was no exit as the bullet desintegrated upon impact with a rib.
That bullet, at 100 yards was packing 1,550 foot pounds of energy. A hot .45 ACP load will develop about 400 foot pounds at the muzzle.
To make a long story short, that little pig just dropped like a brick in its tracks. She made for tasty sauage as I recall.