I just read an FBI report on handgun effectiveness and posted it (twice ) in other threads.

The report states the force from a 9mm slug is equivalent to a one pound weight dropped from a height of 6 feet, and a .45acp is equivalent to a one pound weight dropped from 11.5 feet.

The holes made by each slug if they are not wrapped up in cloth to limit expansion or deflected only affects 2% of the body tissue. The chance that any bullet will cause major bleeding unless it hits the brain or spine or major artery is quite small. Thus the need for multiple strikes is very real.

Now couple that with running, ducking and possible drug use (on the perps part ) and I'm rethinking my 6 shot capacity...