I think the Max Brooks theory is probably bull (like most of his theories). I'm guessing that the whole boucing around the skull thing has been blown out of proportion. I would think (someone will be able to confirm/deny this) that a .22 short lacks the power to punch through the skull twice, so the round will enter the skull then ricochet probably once off the inside of the skull.
Might be wrong but it seems more likely then a round bouncing around the skull like a pinball
Dont take what I was saying the wrong way Prime. That was my point with being accurate with a .22 is that your not going to be able to crank off headshots consistantly.
I personally hit the range at least once, sometimes twice a week. I know for a fact that outside of 10-15 yards I can not make consistant head shots when we run scenarios. Thats why I double tap center mass first. Hell even the navy seals who do nothing but train with their weapons all the time have a hard time with it. Thats why they use double tap center mass, single head shot.
.22 rounds spiral while in the air. They have to in order to get enough velocity to fly any distance. That is why the barrel is grooved. A .22 is a smaller slug. The weight in grains extends from 40 to 70 grains. They are not big. Unless you are up clos a .22lr may penetrate the skull but it will not have the velocity to penetrate and continue to bounce around. The brain matter would be enough to slow it. Now that brain matter would be dead and likely a human too. The .22lr and the .223/5.56 NATO are the same circumference. They are .224". The .223 has much much more power because of the amount of gun pwder behind it. The .223 can penetrate the skull at close, moderate and in the right circumstance long distance. The .223 round penetrates then follows the path of weaker flesh until the round loses momentum or becomes lodged in the skull or other bones. The .22lr moves at about 1050 feet per second. The .223 flies at about 3 times that, between 2600 and 3000 feet per second.
This link is to a pick in My Photos on this site. The bullet at the far right is a .22 long rifle. The bullet 4th fron the left is the .223 Remington.
Dead is dead but the .22lr is no where near the killer of a .45 ACP or .45 LC or any .45 caliber. No where near the ballistics. The weight of the 45 slug penetrating the skull does so much more traumatic brain damage as to make the .22lr look like nothing. What the .45acp and LC lack in velocity they make up for in sheer mass. 230 grain slugs compared to 42 grain slugs. Imagine getting hit my a car moving at 90 MPH. You might survive but if you breath it will likely be hooked up to a machine. The sheer mass of the car colliding with the body could all but dismember a person. You have to look at the whole picture.
22lr is my ideal zombie defense caliber from 50 yards it will do as much damage to the head a 45 would when you are shot from 50 yards or closer and your not wearing a kevlar helmet just about any bullet is going to puncture ur skull and go straight through ur brain killing u instantly.