After chatting with Le Xin, Sun Dasheng knew that the lethality of the bullet is related to the penetration force and stopping force, where the penetration force refers to the penetration force or penetrating force, which refers to the ability of the warhead to penetrate or penetrate the object. Pen × fun × Pavilion www. ｂｉｑｕｇｅ。 info Its size depends mainly on the mass of the warhead, the density of the warhead cross-section, and the velocity at which it hits the object.

Stopping force refers to the effectiveness of the warhead to incapacitate the target after hitting the target, and its indicators mainly include the Danone effect, instantaneous space cavity and permanent cavity, to put it bluntly, it is the size of the laceration wound on the flesh after the bullet is fired.

The stopping force is not what Sun Dasheng needs to pursue, at present, to deal with the current target, the penetration force is the key, because these targets, almost all of them have metal armor, if they can't penetrate, no matter how big the stopping force is, it will be itchy through the boots.

Therefore, he had to use the silver bat membrane wing metal for refining processing, and then change the density of the cross-section of the bullet warhead to achieve the purpose of increasing the penetration. As for the speed of the bullet, this is related to the gun, and it is not something he can change.

After testing, the bullet without changing the material of the warhead can only shoot through a 3mm steel plate, and cannot cause any effective traces on the membrane wing metal of the giant bat. The warhead modified with refined metal can penetrate 8mm steel plates, which is twice as powerful as rifles of the same caliber, and at the same time, the most important thing is that it can leave about 0.2mm bullet marks on the membrane wings of giant bats, that is, the modified warhead can directly kill and injure the terrifying creature of giant bats.

Although Sun Dasheng had never been a soldier before and knew very little about thermal weapons, after passing this test, he knew that with the help of thermal weapons, things would get twice the result with half the effort, which was the meaning of science. He thought that if he had the opportunity in the future, he should make a large-caliber sniper rifle with anti-equipment, and then process the warhead deeply, in that case, he should be able to directly kill a big boss like the silver bat in seconds.

In the following time, Sun Dasheng spent about three days practicing marksmanship.

In fact, for him, who is accustomed to using throwing knives, marksmanship can be completely self-taught, and his calm temperament and clear and sharp eyes are all necessary potentials for a shooter. And the most incredible thing is that his inner vajra cultivation makes his concentration different from ordinary people, which is really a bit unfair for the shooter, because if the shooter also has an evolution level, then his evolution level has gone beyond the scope of solar system creatures.

When he concentrates on the trajectory of the object, he can almost accurately predict the trajectory of the object after 1 second, of course, if the direction of the object's motion is not changed by the stress force, he can predict the trajectory for a longer time. But that doesn't really mean much, what really works is the 0.5 second trajectory prediction, because that's enough to shoot the target.

How so? At present, the muzzle velocity of the bullet in the revolver in Sun Dasheng's hand is about 400m/s, and the effective shooting distance of the general pistol is within 50 meters, that is to say, after pulling the trigger, about 0.125 seconds, the bullet can hit the target, so more trajectory prediction is not of much use.

When he entered the state of concentration, there was also a strange effect, which was that in his eyes, fast-moving objects became slower, and he used to toss a coin in the air, and he was shot at a distance of about 20 meters. It's not that his eyes refresh faster, but that his brain processes information faster, so that objects in motion become clearer in his brain responses, rather than a vague trajectory.

Sun Dasheng really didn't expect that he was a natural shooter. If it weren't for the disaster, he wouldn't have had the opportunity to shoot a few times in his life. Although there was live ammunition shooting during military training, first, I didn't grasp the essentials well enough, second, the number of shots was limited, and third, I didn't cultivate enough mental concentration at that time, so I didn't find much talent.

On the afternoon of the fourth day, he asked for another 50 rounds of ammunition from Lao Li, which were slightly modified and glued to his belt, plus he was covered with a pair of thick jeans, which looked a bit of western cowboy ruffian.

The arsenal was set up improvised in a collective machine shop, and many workers worked around the clock, their main job being to produce enough ammunition.

Sun Dasheng's ears were very sharp, and when he got the ammunition and left the factory, he heard a worker talking about himself:

"See, that person is Sun Dasheng."

"It's him, it doesn't look like it's any different."

"Anyway, he said that the chiseled teeth were coming, which made us all crazy overtime, and we almost didn't get tired and coughed up blood."

"Could it be nonsense, who else can you believe these days? I don't believe he can go to the territory of the giant spider, and if he goes, he can come back, and he can bring back the news of the chiseled teeth. ”

……

Sun Dasheng smiled bitterly, but he didn't care, because there have been more and more such remarks recently. There was a lot of rumour, and there were also such voices of skepticism within the New World, and he believed that if this situation continued for another month or two, he would be labeled on his forehead as a "fame and fame" or "grandstanding".

Everyone is long, and if you like it, you can do it. Sun Dasheng will always be the same Sun Dasheng, a person who can be beautiful alone, a person with a strong heart, and a person who cannot be blown down by a hurricane of words.

People are really strange creatures, things that they are afraid of, but they seem to be looking forward to them. When they do come, I'm afraid it's heaven now.

……

In the evening, there was a light rain in the sky, the sky was gray, and the night fell early.

Ever since he cultivated the Inner Vajra, Sun Dasheng had always trusted his instincts very much, and this light rain in the evening made him suddenly feel a little uneasy, and then he knew that what was supposed to come was finally coming.

His intuition seems to have no basis, but he is vaguely integrated with all things in heaven and earth, and even the slightest strange ripple will leave an image in his state of mind, I'm afraid, this is the essence of intuition.

He walked to the top of the 22-story building, the most cutting-edge outpost, with a signboard of Jiangyuan City's chief 5A office building hanging on the wall.

The building used to be beautiful, but now the blue glass walls are so tattered that they look like they've been machine-gunfired.

Sun Dasheng quietly came to the sentry, this outpost is very important, there are two people at a post, supervise each other, so as not to make mistakes.

The two sentries were shocked when they suddenly saw Sun Dasheng, and after seeing the person clearly, their facial expressions suddenly relaxed, and they were replaced with an exaggerated smile: "Brother Dasheng, it's you, we thought it was the enemy who touched it." ”

Sun Dasheng nodded: "Well, you have worked hard. Go back and tell Dongsheng that I will take over this outpost, and there is no need to change the guard. Listen to my bells. ”

The sentry pondered Sun Dasheng's words for a moment, and one of them asked nervously and inexplicably excitedly, "Great Saint Brother, is the chisel coming soon?" ”

"I don't know, but I'll always be here waiting for them to come."

The sentry sighed, and the two of them didn't leave for a long time, and they really wanted to talk to Sun Dasheng a little more. Regardless of whether the chisel will come or not, no matter what everyone thinks of this mysterious person, but after all, he is the most talked about figure in Yuanfeng, and they have the opportunity to get close, so they naturally refuse to let it go, and want to talk a few words.

"Is there anything else?"

Sun Dasheng looked at the fog in the direction of Yinpenling and suddenly asked.

"Brother Da Sheng, it's not good to leave you alone here, it's better for the two of us to stay with you, in case the chisel comes, it's good to have a care."

"No need. Let's go. ”

"Big Saint, what about your supplies, someone must send them."

"No, I'll bring my own."

The two sentries had no choice but to go downstairs together and leave.

On the way, one person complained: "You really had a lot of things to do just now, the big saint brother let us go, why do you want to stay, and tm to catch me, I was represented by you like this?" ”

"I don't know why, the Great Saint Brother is really not an ordinary person, he actually guards the sentry post alone, you know, at night, this place is like a cemetery, and there will be strange screams from the side of Yinpenling......"

"So, let's go as soon as we can, I can't stay in this hellish place for a minute, and I'm sent here because of my hard life."

"But I don't know why, as soon as I saw the big holy brother, my heart settled down, as long as I was with him, I was not afraid of any Rausch chiseled teeth. Alas, I told you that you don't understand, what is this called, summer insects can't talk ice! ”

"Bah, you sycophant, these words should be said to him, what's the use of talking to me."

"Telling him is a real sycophant, telling you, it means that my words are from the heart."