Our understanding of the power of bullets is quite different. In some movies, bullets can penetrate thick steel walls, and in some movies, even a splint can't be penetrated. Let's talk about bullets first. Due to the design limitation of round-headed pistol bullets, long-range shooting is generally not done. The effective shooting distance is mostly within 50 meters. Accuracy is generally guaranteed within 20 meters. Therefore, most pistol bullets have larger caliber, but shorter body and less than 50 mm in length. Bullets are mostly semicircular. The advantage of this design is that the braking force of the bullet is very strong, and most of the kinetic energy of the bullet is absorbed by the target, causing great damage. Circular warhead will inevitably lead to poor penetration, unstable flight and easy deflection in long-distance flight. Desert Eagle, which is familiar to Chinese and Israeli military industries, adopts the caliber of 12.7 mm, which is extremely lethal and can penetrate 6 mm homogeneous steel plate within 10 meter. A fixed cavity with a radius of 20 mm can be formed when hitting the human body. If such a force hits the trunk, the combat capability can be lost with one shot. The lethality of American 9mm series can also penetrate 3mm steel plate in the range of 10m, with high accuracy and strong penetration. China's 54th Police imitate tokarev of the former Soviet Union, which is also very lethal. It can penetrate 5mm steel plate within 10 meter. Speaking of this, when we come into contact with film and television works, we can often see a person as the protagonist blocking bullets fired at close range. No matter what model, it is almost impossible for a bullet to stop the human body. Even if the bullet hits the bone, it will only turn over and will not stay in the human body. Note that this is a close-up shot. Therefore, human bullets can only kill two birds with one stone.
Talk about the most common rifle bullets. When you hear a rifle, it must be a killing weapon on the battlefield. The bullet from the rifle is fast, straight and lethal. I believe that any soldier on the battlefield will lose his fighting ability if there is a rifle bullet in the trunk. Maybe you will say that the 6.5 mm bullet of the 38 rifle is not very lethal. In fact, the 6.5 mm bullet fired at close range has high initial velocity and penetration. After the bullet penetrates the human body, it forms a penetrating wound, and the stopping effect is not obvious, so the Danone effect of the bullet is greatly reduced, and the damage to human tissue is light. But as a rifle, there are many cases of medium and long-distance shooting. After a long flight, the speed of the bullet dropped obviously, which made the penetration drop after hitting the human body and greatly improved the braking force. Therefore, even if you are hit by a 6.5 mm bullet, you should fall down on the spot and wait for the medic to save you, instead of continuing to charge like chicken blood. In Schindler's List, we saw that German soldiers who executed Jews shot and killed three Jews with 98K. This shot left a deep impression on me. Indeed, the real power of 7.92 mm rifle bullets is reflected. Objectively speaking, the third Jew will die! Because the bullet of 7.92mm rifle deflects and rolls after passing through the first two human tissues and flies into the third Jew's body, just like a portable blender, the Danone effect is fully reflected in the third Jew's body! In movies, we often see the scene of taking out bullets for soldiers who have been shot. In fact, on the battlefield, there are very few bullets left in the bodies of dead soldiers. Most bullets, especially rifle machine gun bullets, must penetrate human tissues and will not stay. At most, shrapnel will be left in the human body instead of bullets! Don't imagine how strong the human body is. You know, rifle bullets can easily penetrate 7 mm steel plates within 50 meters. So how thick is our human tissue equivalent to a steel plate? The answer is: only 1 mm including bones, which shows that rifles can easily penetrate three human tissues. This explains why the battlefield charge must be staggered before and after, and try to avoid overlapping before and after! This is also to reduce the number of people with guns. Actors hiding behind cabinets, sofas and wooden doors to avoid rifle bullets in movies all hope that it will be safer for you to hide behind sandbags in the future. Those China directors who use Yu Pei, copper coins and lighters to block the rifle bullets fired at the protagonist are lamenting the children!
Let's talk briefly about machine gun bullets. So far, only in the war movie Sniper (starring David) directed by Avatar, a famous director in China, have we seen the human body blocking the machine gun bullets. And it is a heavy machine gun. Speaking of heavy machine guns, such as Ma Keqin, Browning, Wilkes, etc., I can definitely tell you that please don't block them with your body within 1 km! I can't stop it. If you stop it, you can throw white phosphorus incendiary bombs at my house. In my opinion, the research and development of machine guns and the design of their bullets are not entirely in the spirit of humanitarianism. Large-caliber heavy machine guns are also mainly used to suppress medium and long-range enemies and enemies behind low-intensity bunkers. This is why dumdum bullets are banned. In real foreign military movies, it is not difficult to find that an asymmetric fixed cavity can be formed after being hit by MG42 general machine gun. The bullet shot from the back of the human body, forming a wound the size of a cup. Therefore, killing people should have a perceptual knowledge of the bullets of machine guns.
In addition, there are anti-aircraft machine guns, aviation machine guns and small-caliber aircraft guns. The ammunition of these weapons is not designed to kill people at all. The performance of bullets is good and bad. At present, the lethality has not completely determined its Excellence. After all, it is enough for the bullet to reach another target and lose its combat capability. Nowadays, while ensuring a certain lethality, bullets pay more attention to the weight of bullets, muzzle flame and even the decibel of bullet shooting sound. The research and development of shell-less bullets has also made rapid progress.
As the author is a medical student, here is a brief talk about the killing situation of bullets hitting different parts of the human body. As I have no experience of being shot, I can only fantasize for a short time. First of all, I believe many comrades are familiar with the name "headshot". No matter watching movies or playing games, the scenes of head shots are somewhat different. The bullet must pass through the bone, that is, the skull, when it is shot at high speed. The skull was smashed into countless broken bones by high-speed bullets, just like a shell exploded to form countless fragments, and the broken bones flew around in the skull to form a second kill. Because there are a lot of soft tissues and cerebrospinal fluid in the brain, it is brain pulp in common parlance. Then the bullet will also form a tension effect. Third, the brain is under pressure. Although the intracranial pressure is determined by the environment and individual conditions, there must be a pressure difference with the outside world. Once the bullet breaks through, the intracranial pressure changes quickly and the intracranial tissue fluid will splash out. Form the so-called headshot effect. But it's not that exaggerated. Unless a large caliber bullet hits the head, the general rifle bullet still kills the head with a cavity the size of a bottle cap. This is because the bullet has strong penetrating power, but the blocking effect in the head is poor. The bullet hit the trunk, but didn't hit the bones in the trunk, causing less damage, mostly soft tissue penetrating injury. If you miss the key, you can save your life in time, but if you hit the bone, the trauma to the human body will increase, and the treatment of broken bones is very difficult, and the wound is not easy to heal. After many operations, the broken bones remaining in the body need to be taken out. If you hit the spine, you can basically give up the rescue. Let's talk about limbs If you are hit by a bullet, you can at least say that you are lucky. If you don't hurt the big blood vessels and bones, you can recover in three months. Injury to bones, even if the medical conditions are superior, will still leave dysfunction. Injury to the external iliac artery, popliteal artery and other leg arteries will still be fatal, because it is difficult to stop bleeding quickly at the end of the limb!