Yang Cong had a meal with Wang Xuan and others at Xuanhua Factory. The holes of several musket parts were finally drilled, and the next step was to grind and assemble them.

The hole drilled out of the drilling machine at this moment is not very smooth, so Yang Cong doesn't have to touch it with his hands. When he put it in a place with better light, he can see the traces of the drilled inner wall. Such a rough inner wall is definitely impossible to fit the thread and it must be polished.

The grinding of the inner wall is not as easy as the grinding of the outer wall. You must use a slightly smaller grinding rod to carefully grind it slowly. Moreover, the grinding craftsmen must have a particularly rich experience, because if there is a little deviation and the inner ring is not round, the workpiece will be scrapped.

While waiting anxiously for several skilled craftsmen to grind and assemble, Yang Cong was considering the problem of inner wall processing.

It is definitely not possible to grind slowly like this. The efficiency is too low. If you want to produce in large quantities, you must improve efficiency.

So, how to improve efficiency?

There are many reasons why the inner wall is not smooth. The structure of the drill bit is not good. It is one aspect. The drill bit speed is too slow. There are also problems with the drilling angle, fixture tightening, etc. It seems that if you want to drill out, it will be smooth. It is impossible to achieve at this time. You can only process it after drilling.

What are the methods for processing after drilling the hole?

Grinding is definitely not possible. Even in later generations, most of the grinding can only be done by hand, and the efficiency is not very high, so it is not desirable at all.

At this time, Yang Cong thought of a simple thing, that is, a reamer.

It doesn't seem to be very difficult to make. It's almost done if you grind a very smooth round rod and then grind a few sharp grooves.

Thinking of this, Yang Cong ordered someone to get charcoal pen and manuscript paper, draw a simple reamer shape, and explained it carefully to Wang Xuan.

At this time, Wang Xuan was shocked and a little numbed by Yang Cong's endless genius ideas. If there were aliens at this time, Wang Xuan would definitely think that Yang Cong was an alien.

The structure of the reamer is not very complicated, and the same problem is still the same, and it is more troublesome to process it. Wang Xuan could only write it down first and order someone to do it when he has time.

After waiting for about an hour, the grinding and assembly were finally completed, and a brand new mesh gun appeared in front of everyone.

Yang Cong immediately brought everyone to the schoolyard and prepared for the test.

The test is actually very simple. I directly recruited a musketeer from the Shenji Camp, explained it to him a little, and then put a larger wooden board two hundred steps away to make a target.

As soon as the news of testing the new muskets spread, not only did the musket soldiers from the Shenji Camp come, but even civil servants such as Tang Shunzhi, Zhao Shichun, and generals such as Zhu Xizhong, Qi Jingtong, and Tang Kekuan rushed over after hearing the news. Everyone looked at the new musket curiously, not knowing how different this thing is from the original musket.

Yang Cong personally explained to the musketeers sent by Shenji Camp. The musketeers quickly poured the gunpowder into the bullet shell, then took out a bullet and pressed it hard, and the ammunition was loaded.

Originally, after loading the ammunition, I had to seal the hole with paper to prevent the gunpowder from being loose. However, this time it was a test and I didn’t have to marches with bullets at all. This step can be saved.

Immediately afterwards, the musketeers of the Shenji Camp pressed the bullet into the bolt according to Yang Cong's guidance, pushed the bolt forward, and the ammunition loading was completed.

If the time for loading ammunition in front is not counted, the subsequent movements are almost completed in an instant. The loading speed is fast, and almost everyone present is shocked.

In the expectant eyes of everyone, the soldiers of the Shenji Camp roughly glanced at the position of the wooden board in the distance, and then took out the fire slit without hesitation and lit the lead.

With a "bang", the bullet flew out instantly. Soon, a dull sound came from the wooden board in front.

Yang Cong immediately took everyone to the front of the wooden board, wanting to see how powerful the new musket is. As a result, the bullet was found under the wooden board, and there was a slight dent on the wooden board!

This means that the power of the new type of mesh gun is very poor, with a distance of two hundred steps, and basically no lethality.

What's going on?

Logically speaking, as long as the loading amount of gunpowder is the same and the length of the barrel is the same, the lethality should be almost the same.

After discussing for a while, everyone came to a consensus conclusion. It was obvious that there must be some gap and air leakage.

So, where exactly is the leak?

Yang Cong decided to try another shot, observe carefully, and see where the fireworks were sprayed out.

This time, the musketman didn't need him to teach him. The bullet loaded and the bullet was loaded in one go, and the speed was very fast. When he lit the lead, everyone stared at the back of the musket, wanting to see where the slight fire smoke was sprayed out. As a result, with a "bang", the bullet did not fly out, but the connection between the two barrels in front and back exploded!

It actually "exploded"!

Seeing this, Yang Cong couldn't help but look dark.

At this time, muskets are prone to explode. He has heard of it because the original barrel was rolled out of thin iron sheet, which is easily deformed after being heated. The bullets are almost tightly matched. As long as the barrel is deformed, the bullet will get stuck in the barrel, and the power of gunpowder will explode in the barrel, and the barrel will explode, which is common.

Unexpectedly, this new musket exploded after only two shots. This is too useless. Obviously, this kind of gun cannot be brought to the battlefield, otherwise, all muskets will be invalid after several battles.

So, what should I do? Should I still produce the original old-fashioned muskets?

This plan is also not advisable. The cavalry wins mobility. No matter who it is, it cannot guarantee that they will not be raided by cavalry in the wild. What's more, if you want to destroy or drive away the Tartar cavalry, you have to go to other people's territory. It is impossible not to be raided.

Yang Cong couldn't help but frown and pondered again.

Now, he understood why the Ming Dynasty's muskets were still the same after nearly two hundred years of development. Because the development of muskets had encountered bottlenecks, the existing technology of the Ming Dynasty could only create an integrated musket, that is, the entire musket was a closed barrel at one end. Once there was a connection, it would be disconnected and exploded like before.

In fact, it is very simple to solve this problem, that is, thread the two barrels and screw the front barrel to the rear barrel. In this way, the two barrels cannot be disconnected and exploded.

However, in this way, the barrel in front must also be cast and drilled, because it is impossible to process threads on thin iron sheets.

There is another advantage in drilling holes with the barrel in front, that is, they are not easy to deform. After all, the thickness of the casted objects is at least about half a finger, so deformation is unlikely, and explosion is even more impossible.
Chapter completed!