Originally Posted by Daryl in Az
Bigger and heavier bullets have more momentum...
To anyone that cares, just wanted to add;
Two bullets of different "weight", both identical in construction/design, can produce equal momentum.
The bullet possessing more momentum from mass will penetrate further.
The bullet possessing more momentum from velocity will penetrate less.
Remember, momentum is derived from both MASS and VELOCITY.
Bottom line, more momentum does NOT always mean more penetration. But at common self defense cartridge bullet speeds from handguns, for any available bullet weight, assuming you're comparing bullets of same design/construction, the heavier bullet will usually out penetrate any other lighter one.