Song Zhewu picked up a 6.5mm bullet, fiddled with it in his hand for a while, and said: "Although I, Song Zhewu, swear, as long as others don't come to fight me, I will never fight a civil war again in this life, and the muzzle of the Fourth Route Army will only be pointed at foreign enemies." What kind of bullets we use are used to call on foreign invaders, and we should not have any scruples. "But even so, we can't use such bullets produced by Yan Xishan to increase the lethality. ”

"Not only because it is suspected of being a dummy bullet, but mainly because such a warhead is of poor quality and has a very poor penetration effect, and it is difficult to penetrate steel helmets, such as the Soviet army and the Yue army are troops equipped with steel helmets."

After a pause, Song Zhewu looked at everyone, and slowly continued: "However, I still think that our future standard rifles should use 6.5mm caliber." ”

Song Zhewu's words made everyone present a little overwhelmed.

"Since you know that the 6.5mm caliber has low lethality, why do you choose it?"

Song Zhewu ignored everyone's puzzled gazes, and continued to himself: "The reason why I chose a 6.5mm caliber rifle is for three reasons: First, as Director Zhou said, Shanxi is short of copper, at least now, so I am in favor of using 6.5mm caliber. ”

There is one thing that Song Zhewu did not say. In fact, Shanxi is not really short of copper, Hengqu copper mine later proved reserves of more than 5 million tons, is definitely a large copper mine, but at this time the world does not know, and thought that it is just a small copper mine.

However, at this time, Jinnan was not under the jurisdiction of his Song Zhewu, and if he wanted to mine copper ore there, he not only had to agree with the Shanxi Provincial Political Axe, but also had to pay a huge amount of mining taxes to the Central Political Axe Ministry of Finance. Even so, it will take five years to reach large-scale mining at the earliest. Therefore, it is necessary to save copper, not to mention, his large-scale production and construction also needs a large amount of copper.

"However, don't worry, although Shanxi has little copper, but not that we really lack copper, not to mention that there are copper mines in South Mongolia, there are also copper mines in North Mongolia, according to the preliminary exploration results of the Soviets in North Mongolia, North Mongolia has discovered and identified more than 80 kinds of minerals, mainly coal, oil, copper, manganese, tungsten, molybdenum, aluminum, lead, zinc, mercury, tin, gold, fluorite, rock turquoise, phosphorus, asbestos, graphite, mica and other mineral resources. And most of them are large mines. ”

"Among them, the copper resources in Northern Mongolia are particularly rich, according to the data of the Soviets, there are 5 proven copper mines, and the reserves rank first in Asia. The Erdenet copper-molybdenum mining area, the Chagan Subugaya copper mining area in Manduhu County, and the Oyun Taulagait large-scale copper mining area in Khan Bogda County have total reserves of more than 2 billion tons, and we can't mine them even in hundreds of years. Of course, not only is the terrain complicated, there are no railways, not even roads, and we can't count on it for the time being. It will take about five years at the earliest to have the conditions for large-scale mining. ”

"The second reason is the recoil problem, the recoil is large, it is difficult to grasp the accuracy when shooting, and the accuracy of shooting for a long time will be worse. Therefore, I abandoned the 7.92mm caliber and chose the 6.5mm caliber. ”

"The third reason is that our Fourth Route Army now uses hundreds of thousands of 6.5mm caliber guns, although there are also 7.92mm caliber, such as the weapons we captured the Soviet Army, the captured Gui series, and the weapons obtained in the Hanyang Arsenal, but the 7.92mm caliber is only a minority in our Fourth Route Army after all."

"The current production capacity of our arsenal is not large, and Chief of Staff Xiao told me, 'If our rifles are finalized, with the current equipment, the annual output will be about 100,000 units, and according to the current number of troops in the Fourth Route Army, it will take six years if all our troops are reequipped. Although we will definitely continue to expand our production capacity, our troops will also continue to expand, and it will take a long time to complete all the re-equipping. ”

"In particular, if we choose the 7.92mm caliber, then we will now have to mass-produce two calibers of bullets at the same time, and the pressure on the ammunition of our arsenal will be very great."

Song Zhewu put down the bullet in his hand, clapped his hands and said: "Because when we first developed this rifle, we paid great attention to the length and accuracy of the gun, so now the penetration of this rifle is about the same as that of the 38 rifle, and at the same time the lethality is weak. However, it doesn't matter, we can start with bullets. ”

Song Zhewu waved his hand to stop Sun Sihua, who couldn't help but speak, and continued: "In order to ensure the penetration of bullets, of course we can't use the previous earth copper, we should use copper-nickel alloy. Now, our two new non-ferrous metal smelters have the capacity to start, they are both electrolytic smelting, and the products are refined copper, which can ensure the quality of the alloy. ”

"However, lethality is also something we have to consider."

Song Zhewu took out a cigarette, and when he touched the match again, he suddenly thought of something, smiled self-deprecatingly, and put the cigarette that had been in his mouth back into the cigarette case.

"I don't think it's necessary for us to fill the front of the warhead with straw paper, which will cause the bullet to move back too much because of the center of mass, and the nutation of the warhead after exiting will be too large, which will affect the range. Still, we can fill the warhead with clay. Shanxi has clay, and the specific importance of clay is much greater than that of straw paper, which can not only reduce the nutation effect, but also cause the warhead to roll after being shot into the human body, causing large wounds ......"

Zhou Liqun said excitedly: "Commander, to be honest, I also like the 6.5mm caliber, it is not only highly accurate, but also has a long range, which is very suitable for the development of a sniper rifle on this basis, and the only dissatisfaction is the problem of excessive penetration." Well, if filling clay solves this problem, then choose a 6.5mm diameter. This gun is definitely going to be a good gun, so let's finalize it. ”

Song Zhewu shook his head with a smile and said, "Don't be in such a hurry. ”

Song Zhewu's attitude made Zhou Liqun stunned, "Since the problem of excessive penetration has been solved, why can't it be finalized?" ”

Song Zhewu smiled and picked up the rifle on the table, pointed to the semicircular hole that was snatched up, and said: "If this gun wants to be an excellent rifle, its sights must be changed, and not only this rifle, but all the guns we design and produce in the future must be changed." ”

Song Zhewu's words not only made everyone stunned, the aiming equipment of this gun is very ordinary, almost all guns in the world are like this?

Everyone's expressions were already expected by Song Zhewu, and under the surprised and stunned gaze of everyone, Song Zhewu took out a pen, took a piece of target paper, and drew a rifle on the back of the target paper, and a semicircular hole and a crosshair.

Pointing to the sketch he had just drawn, Song Zhewu explained: "Now all weapons are aimed at circular or semi-circular holes, and its principle is: using the physiological characteristics of the human body, when the human eye looks out of a small hole, it will naturally move the center of the pupil to the center of the small hole, in order to obtain the maximum amount of light transmission. In this way, the position of the human eye and the hole can be said to be fixed, and with the addition of the front sight, a 3-point line is formed, and aiming and shooting can be formed. ”

"The problem is that when anyone is looking for this virtual center of circle, they find a slightly different position, and it is very difficult for most people to find the real center of the circle, and it is also difficult for novices, or even veterans, to find the real center of the circle when they are in a hurry, which affects the accuracy of shooting targets."

Song Zhewu then drew an inverted V on the paper, which was removed at the top of the top one-sixth of the point, much like a figure of eight.

Pointing to this inverted V word, Song Zhewu continued: "And now this hole is actually a triangle with a missing angle, according to the principle of human thinking and vision, it is relatively easy to accurately find the apex of this triangle, that is, the intersection of two edges." ”

"It's great for quick and accurate shooting, especially for recruits, who can get to the point of accurate shooting more quickly. Therefore, I suggest that in the future, the guns and aiming equipment we design and produce should be changed to this model. ”

Song Zhewu's words surprised everyone, some people bowed their heads and pondered, and more people were obviously skeptical, but because of Song Zhewu's status, no one expressed doubts in public.

Others can not express their position, but Zhou Liqun, the director and chief designer, cannot but express his position.

Although Song Zhewu was the supreme leader of the Fourth Route Army, and even as far as he knew, his commander was well-read and studied various disciplines, but Zhou Liqun felt that he still had to be cautious on this issue, after all, this was the standard rifle that was chosen after the whole army of the Fourth Route Army.

Zhou Liqun pondered and said: "Commander, this design of yours is very novel, but I still think it is better to build a few sample guns first and make a decision through comparative tests." ”

Zhou Liqun's words did not make Song Zhewu unhappy, on the contrary, he appreciated Zhou Liqun's cautious attitude even more.

Song Zhewu waved his hand very generously and said: "Experimental comparison is necessary, although there is no problem with this concept, but what is the most appropriate proportion of the missing corner of the hole, it is also necessary for you to adjust and improve in the experiment, and find the best ratio." ”

Song Zhewu is not at all worried about the feasible surname of this novel aiming equipment scheme, this is not made up by him Song Zhewu, this is the latest research result 70 years later.

Such a new type of sighting device has little or no effect on a good, or skilled shooter.

However, it is different for recruits, using such aiming equipment, most recruits are said to be able to score more than 80 rings after a short period of training.

(To be continued)