Later, after improvements, a special paint was sprayed on the cartridge case. This paint has the function of lubricating and sealing the gun bore.
Therefore, most of the bullets in our country are actually painted iron-cased bullets. Only a few precision sniper rifles use expensive copper-cased bullets. This is because the stability of the painted iron-cased bullets when fired is not as good as copper-cased bullets.
Yes, so these sniper rifles use copper-cased bullets for accuracy.
As for the history of the warhead, it is actually similar, because the steel warhead wears the rifling too seriously and has reached a state that is completely unacceptable. And the most difficult and expensive thing to process in a gun is precisely the barrel, so
In the end, I had to give up the steel slug, and then aimed at the full lead slug.
To put it simply, the warheads are not wrapped in copper shells, and are all made of lead pressed warheads. This all-lead warhead solves the problem of too high hardness of steel warheads, and the barrel rifling does not suffer much wear.
Moreover, this kind of all-lead bullet has strong ductility, so it has strong air tightness, and the kinetic energy of the bullet is also better.
Therefore, for quite some time, many bullets with lead bullets appeared. [Digression: When the author was a child, probably around 90 years old, there were some bullets left over from the militia days of his elders at home. There were various types of bullets, including many of these.
Planting lead bullets. Later on, there was a gun ban campaign for a period of time, and when called upon to hand in all of them, they all were handed in.]
However, this all-lead bullet also has its shortcomings. First, the metal texture of lead is too soft, so its penetrating power is not strong and its lethality is limited.
Therefore, technicians added a steel core to the center of the lead warhead. The tip of the warhead is also made of steel, and only the outer parts that contact the rifling are lead. In this way, this lead warhead has been solved.
The problem of bullet penetration is not strong.
Although this problem has been solved, another problem has been exposed. It is still because the lead bullet is too soft and slides in the rifling of the barrel, causing lead to hang in the capacity. To put it simply, the bullet is coming out quickly.
When the bullet is fired, it may be damaged due to too much force and too fast speed, causing part of the lead on the bullet to remain on the rifling.
As a result, the damaged warhead will be affected by its aerodynamic shape during flight, so the warhead's flight trajectory will be affected, thus greatly affecting the accuracy of automatic shooting.
On the other hand, what is even more serious is that the lead left in the barrel will hinder the firing of the bullet below, thereby causing the risk of the chamber exploding.
So the technicians wrapped a copper shell around the lead bullet to form a kind of protection. Because the texture of copper is harder than lead, and copper itself is a metal lubricant, it slides out of the barrel more smoothly.
So there are copper-coated lead core bullets and copper-coated steel core armor-piercing bullets.
In fact, this is also the development process of bullets, or the development of current bullets. The earliest musket bullets were lead bullets, which later developed step by step into the prototype of today's bullets.
It has been almost a century and a half since the bullet appeared. Although it has changed in some aspects, the basic principle of the bullet has not changed. It still consists of four parts: the warhead, the cartridge case, and the propellant primer.
Many technical experts in the military industry have always hoped to make breakthroughs in the field of bullet technology, but they all ended in failure.
Unexpectedly, Wu Hao and the others actually developed a brand-new bullet. Although this bullet is just a warhead used in electromagnetic guns, it is also a breakthrough and an innovation.
As professional soldiers, both Luo Kai and Pang Zhengqing knew how difficult this was, so they were so surprised.
After explaining this, Wu Hao answered Pang Zhengqing's question.
"The electromagnetic gun does not use chemical energy as propellant to launch warheads, so it does not require ammunition or cartridge cases, only one warhead. The bullet is actually in a state of continuous acceleration throughout the entire barrel, not because of
Ammunition burns in an instant accelerated state, so it has very low requirements for air tightness.
Not only is air tightness not required, but the gap must be enlarged, which is conducive to the huge heat dissipated during sustained high-speed design, so our barrel is actually hollowed out.
Rather than saying it is a gun barrel, it is actually a launch rail. It is composed of several circular steel rails with graphite sliders on them, which will greatly reduce the friction generated by the bullet during sliding acceleration.
On the one hand, it can reduce the heat generated by sliding friction; on the other hand, it can improve the stability of the warhead during launch and improve its design accuracy.
In fact, its principle is very simple, it is a bit like the principle of our tank's smoothbore gun, and this warhead is also a bit like the stable shelling tungsten core armor-piercing projectile used in tank guns."
At this introduction, Wu Hao picked up the extended precision marksman rifle, and then removed the magazine. Inside, a warhead similar to the hidden water droplet streamlined warhead suddenly appeared, except that there was another one at the end of the warhead that looked like
It's a plastic tail. As Wu Hao said, it's very similar to a tank's sabot-stabilized tungsten core armor-piercing projectile.
"Are these two types of bullets the same?" Luo Kai couldn't help but ask.
Wu Hao smiled and nodded: "Actually, they are the same, except that one has this kind of tail fin and the other does not have a tail fin. In fact, there is not much difference in their short-range design. The bigger one is in the middle and long range.
We are still in the experimental stage for these two types of bullets, but in the future, the finished products should be replaced with bullets with plastic tail fins. Although a plastic tail fin is added, its cost does not increase much, and the overall weight is not heavier.
How much, only a few grams or a dozen grams, basically negligible."
At this introduction, Wu Hao pushed out a bullet from the magazine and showed it to the two of them, saying: "Compared with traditional warheads, this kind of warhead is more aerodynamically designed, so it flies in the air.
The posture is more stable and the trajectory is straighter.
And it is less affected by air humidity and wind speed than traditional bullets."
And Luo Kai and Pang Zhengqing finally saw the full picture of this kind of bullet at close range. As Wu Hao said, it has an underwater shape, and is generally similar to the traditional rifle bullet, but the details are still very different.
.
For example, the overall appearance is bright metallic silver, and the tail of the warhead is shrunk and slender, with a plastic tail fin on it. If it had not been removed from the firearm magazine and replaced elsewhere, both Luo Kai and Pang Zhengqing would have thought it belonged to a child.
As for the toy, I couldn't imagine that it could be a bullet capable of killing people.