Cao Jiawen saw that he looked puzzled, and hurriedly found two finished Mini bullets and handed them to him, Lin Xiao took a look at it, and immediately realized.

For flintlock rifled guns, airtightness is important, however, if the caliber of the bullet fits too closely into the barrel, it will make it difficult to reload, after all, this is still a breech gun, and the bullet is to be poked through the barrel.

Therefore, in order to smoothly reload, in this era, even in Western Europe, smoothbore flintlock pistols are used, and there is no need to engrave double lines in the chamber, and the caliber of Mini bullets is generally slightly smaller than the barrel, but in this way, it will affect the air tightness and greatly shorten the range.

Now, Cao Jiawen used an ingenious method to solve this contradiction, the two bullets in Lin Xiao's hand are exactly the same shape, conical, and they are pointed-nosed bullets, which can be at least one generation more evolved than the round lead bullets fired by the smoothbore gun, and the range and accuracy are not the same.

The difference between the two bullets in Lin Xiao's hand was that one of them had a circular hole in its tail, and the back half of the bullet was hollow, while the other had a small wooden stake plugged in the hole.

"The caliber of the bullet, slightly smaller than the barrel, is conducive to loading, once fired, the high-pressure gas produced by the deflagration of gunpowder will make this small stake rush forward, so that the whole lead bullet will expand, and the chamber of the gun is tightly fitted, under the effect of rifling, the bullet will rotate while flying, greatly improving the stability of the flight."

Cao Jiawen slowly explained on the side.

"Effective range, how far can it be?" Lin Xiao couldn't wait to ask.

"You'll find out if you try it yourself."

"What about the barrel? It's all blued? How is this done? ”

"This, thanks to Zhou Gong, you should go over there in a few days to see it yourself, his chemical factory, but it has created a miracle."

"Really? What did he produce? ”

"Lao Zhou, this person, it's really amazing, everything is well planned, as soon as the hydropower station is running, his chemical plant and smelter just happened to be completed, no, only a few days of hard work, not only the trial production of soap, even nitric acid and sulfuric acid are quickly produced, of course, the output is still very small."

Cao Jiawen cocked his thumb and smiled, "I originally planned to polish the barrel, but I didn't expect that now it can be macerated and blued, which is a big step forward." ”

"Tsk, that's amazing."

Lin Xiao praised again and again when he heard this, of course he knew that the barrel that had been treated with blue treatment was not afraid of rust, and it could extend the service life by several times.

"Let's try the gun, shall we?"

Cao Jiawen doesn't want to talk to him anymore, and there will be good things to offer later.

Immediately, a group of mermaids rushed out and walked towards the corner of the big playground, Situ Zheng and they pushed a cart and let Lin Xiao sit on the car, so that he would not bully Lu Hua again.

This soulless thing to do, others can't stand it.

Cao Jiawen asked Situ Zheng to insert the wooden target at a distance of about 150 meters, which made Lin Xiao slightly surprised, you must know that the accurate range of the M4 carbine is only 400 meters.

He knows that the maximum range of this rifled gun in history can reach 500 yards, but this does not consider accuracy, if you want to accurately hit the target, you generally only shoot the target paper within 100 meters, and now Cao Jiawen is so confident, it can be seen that he has already tried the gun.

After everything was ready, Lin Xiao decided to test the gun himself.

This time, what Cao Jiawen handed him was a real finished bullet, which was a conical paper shell bullet, the front end of which was equipped with a pointed lead bullet, and the rear part was pre-packed with gunpowder, which can be regarded as the world's first fixed ammunition.

I saw Lin Xiao pick up a small gourd-shaped canister, pour some black powder into the fire door, and then stuff the paper shell bullet into the muzzle, skillfully remove the whole strip and stab the bullet to the end.

Then he pulled the copper hammer, raised the gun to aim, pulled the trigger and fired, and the whole set of actions went smoothly, probably in less than 20 seconds.

Lin Xiao only fired three shots, and then he had an evaluation of this gun, except for the reason of black powder, the muzzle smoke is still a little big after firing, this gun feels very good, and the feel is also very comfortable, it is a good gun.

After three shots, Situ Zheng immediately ran out to retrieve the target, only to see that the three bullet holes in the center of the target paper were arranged in a triangle, and the circular probability deviation was less than ten centimeters.

"Wow!"

Seeing this, everyone exclaimed, if there was a table, they would definitely be amazed.

This, this gun, is too against the sky, right? This is all on par with the accuracy of modern rifles!

"What's this? Without this accuracy, I'm embarrassed to invite you. Cao Jiawen looked proud.

Historically, since the advent of this Minnie rifled gun, its range immediately surpassed that of its contemporaries, and since then, artillery has been forced to retreat behind the infantry and become a support weapon, rather than the main attacking force.

The long-range battle, in which infantry began firing within 500 yards and did not have to wait for 100 yards to open fire, gradually eliminated white-knuckle combat, and even the cavalry charge tactics, which were once invincible in the world, have since withdrawn from the stage of history.

Moreover, due to the drastic increase in the rate of firing, in order to give full play to the role of individual shooting technology, the armies of various countries gradually adopted evacuation formations, and at this point, the tactics of platoon guns in dense formations were gradually eliminated, and the form of warfare entered the era of modern warfare with dense trenches.

"Lao Cao, can you make more of this gun?" Lin Xiao stroked the gun, smiling happily, only three shots, he couldn't put it down.

"No, the three thousand that I said would not be more."

Cao Jiawen refused, "My special steels are still very useful, and they can't be wasted anymore...... Besides, only three thousand of these butts were ordered, and they were gone. ”

"Uh...... "That's the reason?"

"Don't worry, I only said that I won't build it for the time being, I didn't say that it won't work all the time,"

Seeing this, Cao Jiawen smiled narrowly, "When Lao Zhou refines qualified steel, as long as the output is sufficient, it can still be considered, but ...... I'm afraid you won't want it yourself. ”

As he spoke, Cao Jiawen took another crate from the cart, opened the lid, and mysteriously took out a more beautiful rifle.

"Medium?"

Lin Xiao exclaimed, and with just one glance, he recognized the model of this gun.

He is an expert in firearms, although he can't make them, but in terms of experience, no one can compare to him, and he said with a stunned face when he saw this: "This, where did it come from?" You, you won't be ......? ”

This kind of gun, he is all too familiar.

The "Zhongzheng" rifle is a Chinese version of the German 1924 Mauser rifle based on the prototype during the Republic of China, using a 7.92mm pointed Mauser rifle cartridge and a single-shot rifle with a rotating pull-back bolt.

The total length of the gun is only 1.1 meters, plus the total length of the bayonet is about 1.5 meters, and the total weight is only 4 kilograms.

At first, Chiang Kai-shek believed that the length of the Mauser was based on the European body, and that the Chinese soldiers were shorter than the European soldiers, so he suggested that the butt be slightly shortened and the bayonet lengthened.

Due to the high storage speed of the pointed bullets used, this gun has great lethal power, and it is either dead or seriously injured when it hits important parts of the human body.