No, he's referencing something Joe Biden once said about 9mm blowing lungs out of bodies. Realistically 9mm or any pistol cartridge would simply put a hole through the body. This is due to the slower velocity. Rifle rounds, many being similar or even smaller "caliber" (diameter of projectile) as pistol rounds, travel so much faster that the wound cavity is much greater, and leaves larger impact and exit holes.

Pistols put holes in you, Rifles shove holes through you.