The nano bots Ive read about in science medicine journals all require power in order to operate. One journal said that they will enter the body and do their job, then be passed through the intestinal tract. It said that eventhough their microscopic, they will infact run out of power at some point.
So how long can that be sustained? Once they run out of juice, they goes your dead zombies. Thats why I think a mutated virus is the logical path for a zpoc to happen. Then you get back to what I was saying about the body, and how it requires blood to function.
Its not about the pain factor, when it comes to blood moving their body. Its about blood loss. Simple physics states that more volume will leave a bigger hole. Translation to a zombie, or a person for that matter is this. The more damage caused by a projectile, the more blood loss that is going to occur. Thats simple trauma 1 in any medical text book. Doctors, medics, nurses, sergeons it all boils down the same way. Im not saying a smaller caliber isnt capable of it. Ive ran calls where some gang banger shot a guy with a small .22, or .25 caliber and its hit a bone traveling up into vital organs. It can happen its just statistically not probable for smaller calibers to kill that way. Not eveyone out there, even expert shooters are capable of consistant head shots. Most people though, can hit a target center mass even when they are flustered and nervous.
Ive stated before though, I dont plan on relying on my firearms. I plan on getting away from danger, and fleeing as much as possible. If I do have to use a weapon, I just have more faith in a larger caliber.
The body needs blood movement in order to move. Its that simple man, there is no magic trick that can change that. Most likely zombies will be sick people, maybe completely brain dead. Never the less you are correct sick people.
I have a kid, and if it means I have to shoot sick people. Absolutely with no regrets I will shoot any infected person that comes near my son. I wont think twice about it, or lose a seconds sleep over it.
The idea of trying to out run a horde of zombies is rediculous. I wont be anywhere near a horde. If you have to run from a horde there was absolutely no planning on your part.