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Copperbeard flipped through the design drawings given to him by Duke, and Copperbeard was very clear about the requirements for the caliber of the barrel above, because the barrel actually had the same requirements. However, this requirement is not directly stipulated in the guidelines, and it is generally based on the experience of the musket master to create a similar caliber by himself.

Anyway, the muskets in these years are all shotguns, and there is no problem that the caliber of any bullets does not match, and the barrel is small, and the barrel is large, and the ammunition is more, which is also a common thing in the manual era.

However, when Copperbeard saw the rifling, his eyes immediately lit up, and it was obvious that he must have seen such a thing, but it had not been realized before.

"Lord Lord, I have heard of this rifling you mentioned before, and there used to be some ace musketeers in our Dwarven Empire, and their shooting accuracy is very high, far exceeding that of ordinary musketeers of the same kind. It is said that the reason why they were able to have such a high degree of accuracy was because their muskets were different, with some special lines on the inside of the barrel. ”

"However, at that time, the musketeer of the ace musketeer was one of the top secrets of the Dwarven Empire, and it was also one of the ways that the dwarf king thought that transcended magic, so ordinary musketeers could not touch these at all. I also heard about such a thing from my grandfather, but I didn't expect to see a similar principle today, it turns out that those lines are called rifling!"

Copperbeard's tone was very excited when he said this, and it seemed that it was an exciting thing for him to be able to crack the secrets of the Dwarven Empire.

"Lord Lord, the legend of Storm Castle is that you are the Chosen One, and now it seems that this is really the case, and even you know the secret rifling of the Dwarven Empire, which really surprises me!"

"Or can I lead you to defeat the Ice Demon?"

Duke said proudly at this time, and then continued: "This records the process and method of rifling, you and Bruro study it to see if you can study it." If it can, it will even be lowered to the musket in the future, and then the firearms of the entire Storm Castle will be qualitatively improved. ”

The rifling production method introduced by Duke this time, which is called the cutting method in the process, is the oldest rifling processing method in the Middle Ages, and it is also a very backward method, which has been directly eliminated in modern times.

The principle of this method is very simple, that is, use a hook-shaped turning knife, stick into the barrel or barrel, and then cut out the rifling little by little. At the same time, when cutting, the lathe is used to continuously rotate the barrel or barrel, so that the rifling can maintain a certain slope, and then when the bullet or cannonball is shot, it can rotate, greatly improving the muzzle velocity and stability.

From the point of view of the principle of the cutting method, it can be felt that it is a very primitive method, and the whole rifling process is completely handmade, and it takes dozens or even hundreds of times to cut the rifling out one by one. That's why, when Duke made the musket before, he didn't hesitate to choose the front-loading smoothbore musket, because this thing may be more time-consuming and laborious than building the barrel, and it is basically impossible to complete mass production.

Moreover, it is already the nineteenth century to really solve the problem of mass production of rifling, and there are too many processes beyond this era, and it is impossible to break through in a short time. Duke simply gave up.

However, compared with the barrel, the gun is obviously more suitable, firstly, because the barrel is large enough to be easier to operate when cutting. Another point is that compared to the shotgun of the musket, there is still a basic prototype of the cannonball in these years, that is, a large iron ball, which is more suitable for rifling.

This kind of iron ball cannonball was also used in the Middle Ages to divide the level of artillery, such as the nouns of one-pound cannon and two-pounder cannon, which refers to the weight of the cannonball. It's just that Duke chooses to take a longer view, directly using the imperial inch to describe the caliber, which will not be obsolete for hundreds of years to come.

After arranging the construction of Storm Harbor and the development of artillery, in addition to patrolling and monitoring the ice demons in the Monster Valley on a daily basis, Storm Castle finally fell into a rare calm.

But even this calm is like the calm before the storm, because whether it is the Sea Clan, or the Ice Demon, or even the Storm Castle itself, it is like a beast licking its wounds. The territory is only so large that any party that wants to develop must encroach on the boundaries of other races, unless the other party chooses to submit.

The Ice Devil is like that, the Shark Tribe is like that, and even the Storm Castle itself thinks so too. With the massive increase in population in the future, according to Duke's estimates, the maximum population of Storm Castle should be only 500,000 people, which is only to say the land output, not including the land that will need to reward the Storm Army in the future.

Therefore, if you want to get a larger living space, the Shark Tribe is not negotiable, it must be fought, because the ocean represents the future. As for the Monster Valley, it is not realistic to want to occupy it, because the Monster Valley is almost the same size as the entire Andorran pro-kingdom, and the places that can be detected at present are only some periphery.

But even so, the Seine River will definitely cross the Storm Fort in the future, and extending the entire Storm Fort along the banks of the Seine River will also invade the territory of the Ice Demon. Unless Duke has a hot head to capture the territory of Alpine City, or even more arrogantly, he marches long distances to the Milan Empire, otherwise the scope of Stormkeep's expansion is extremely limited.

So the mortal enemy is the mortal enemy after all, after a big battle, lick the wounds, and soon for the sake of living space, it will be the outbreak of another big war. It's just that Duke hopes that in the next big battle, the Storm Army will not rely on Storm Fort to defend passively, but counterattack into the Monster Valley!

For the next period of time, Duke was busy coordinating the construction of Storm Castle, and at the same time trying to find time from time to time to comfort the wounded in the church hospital, which was also a good time to gather people's hearts.

In addition, Duke is officially located in the valley of the fort, and the scientific research base of the storm fort during the construction period will be placed in the location of the valley in the fort where some research and development that is not closely related to production will be placed in the valley of the fort to avoid the situation that the ice demon will attack again and the hydro factory will have to give up.

For example, Watt's steam laboratory, Serra's metal laboratory, Galileo's comprehensive instrument laboratory, etc., are all placed in the valley of the fort. At the same time, some of the more important workers and technicians, Duke also built a residence for them in the valley of the fort to provide the best protection, they are the most important talents in Storm Castle.

It's just that Bruru's mechanical laboratory and Tongshu's firearms laboratory are the kind of equipment that must be used in the hydraulic factory because they belong to the kind of production and research and development, so they still stay in the hydraulic factory. And Duke officially named the valley inside the fort as the Storm Castle Research Base!

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