Originally Posted by
Nomercy448
Don't be fooled by kinetic energy. Kinetic Energy is not conserved in real world, inelastic collisions... However, MOMENTUM is conserved in real world collisions, and momentum is simply mass times velocity - so when a 45-70 reaches 200 yards, it's actually hitting ~20% harder than a 308win...
It's interesting that you mention "Momentum", I'm a ballistics enthusiast, and I had forgotten about this factor in this area of physics. I'll research more about this.