This, the first test launch, we are not too sure, so let's put a 450 mm vertical target at a distance of two thousand meters to give our guests a view. Qin Zhenhua said: "If you can't pierce it, just saw it open." ”

At present, the penetration depth of conventional armor-piercing shells is about 300 millimeters, and only the tank gun of the Leopard-2 tank, which is the most powerful German, can penetrate more than 400 millimeters, in the war in Israel, their M111 armor-piercing popped up the big name, the Germans introduced the corresponding technology into the past, and developed a new generation of armor-piercing bullets, which is said to be very powerful, but how much is specific, or a question mark.

Now, opposite Lao Ba is the T-72, the armor of this tank, although it is very powerful, but in fact, it is about 300 mm level, after all, the big countries in the East have always taken the tanks of the Soviets as their combat targets, and even the 105 mm guns have been able to penetrate properly. (There is no reactive armor attached, and the kind of export monkey version with quartz sand mixed in it, is that the level?) ）

Even if the other party strengthens it again, to 400 mm, that is, the limit, so now it is enough to put a 450 mm target here.

"Okay, two thousand meters, four hundred and fifty millimeters target, quick, get ready." Xie Huimin said.

As the site of the test gun of the Second Machine Factory, there are various targets here, so it was quickly prepared, and in the eyes of everyone, the propellant behind it was also stuffed in.

"Is this gun, and the shells of the tank guns of the T-72, common?" Berg thought of something and spoke.

"Although the caliber is the same, our medicine room is different from theirs, so the shells are not universal." Xie Huimin said.

There are many different theories about caliber, for example, the two systems of the East and the West, the caliber is different, in terms of rifles, the Soviets have 5.54 mm caliber, the Americans have 5.56 mm caliber, and in terms of artillery, the Soviets have 152 mm, and the Americans have 155 mm.

Why is that?

So there is an analysis, of course, for convenience, on the battlefield, what to do if you run out of bullets? If you pick up the Soviets, you can use it!

The caliber of the Americans is slightly larger than that of the Soviets, so the bullets can be used when they are stuffed in, and conversely, the Soviets cannot use the bullets of the Americans, because the caliber is small and will explode.

Of course, this is just a kind of layman's random speculation, in fact, it is definitely not as simple as a small caliber can be stuffed into a large caliber, the propellant behind is different, the cartridge case is different, how to use it?

Needless to say, the caliber is slightly different, and even if the caliber is the same, it may not be usable.

Now, our own 125-mm guns and shells can't be used by the Soviets' 125-mm guns, because the propellants in the back are different!

"The pharmacy is different?" Berg looked at him strangely.

"That's right, our chamber is larger, more than 13 liters, which is the largest of all tank guns, so that the more charge is fired, the more kinetic energy the shell can obtain, and of course, this also puts forward higher requirements for the barrel pressure."

Increasing the propellant can significantly increase the power, but that must be able to withstand the barrel.

Hearing this, Berg nodded, and then, Qin Zhenhua on the side added: "Tank, firepower is king." ”

That's right, firepower is king!

Reloaded, aimed, and then, far away, someone pressed the button for the electric shock.

"Boom!"

A huge roar sounded, and on the side of the gun, a huge fireball suddenly appeared, black smoke rose, and in front of the fireball, the 460 mm tungsten alloy bullet core threw away the butts on both sides and flew forward!

"The muzzle velocity of the muzzle is about 1,700 meters per second." Xie Huimin said: "Therefore, the target two kilometers away only takes more than a second. ”

Every data is talking about the strength of the performance of this armor-piercing projectile, and now, just as he was talking, the armor-piercing bullet had smashed the 450 mm thick target, and then, drilling hard into it, under the huge heat, the surrounding metal began to melt and melt, and a molten hole through which the bullet rod passed was left behind.

Then, the warhead pierced the target, and the tail behind it was stuck at the end, and in this way, it remained in it, and the boom that had exhausted the last kinetic energy was stuck in the target, like a shuttle dart stuck into the mud.

"Penetrated?" Hearing the target reporter's report, everyone was extremely surprised, ran all the way, came to the target two kilometers away, and looked at the bullet stick stuck inside, Berg immediately made a decision: "This cannon can already meet our requirements." ”

The T-72 tank on the opposite side, although it also carried a 125 mm cannon barrel, but in fact, the penetration depth could not even reach 300 mm, according to Qin Zhenhua, it was about 220 mm, which was really bad enough, and the same 125 mm tank gun in the eastern countries had a penetration depth of more than 400 mm!

The target of 450 mm is just between passing through and not being able to penetrate, in fact, it is already considered to be able to penetrate, how can this kind of performance not be satisfactory?

"Once we have completed this project, we hope that this kind of matching artillery shells can also be produced in our country." Berg followed, making another request.

A large country must be able to produce its own weapons, and they must produce not only tanks, but also artillery shells!

"That's it." Qin Zhenhua sorted out his wording, and then said: "The production of this kind of shell requires advanced technology, the processing of the bullet stock can only be completed by CNC machine tools, and the smelting of the bullet rod is even more complicated, so you should try to produce tanks first, and when your technology is improved in the future, we can consider exporting the production technology of this kind of shells, but recently, you really can't." ”

Berg, who listened to it, laughed: "Yes, not now, but in the future, we will definitely be able to produce it ourselves!" ”

Needless to say, Lao Ba, even Ah San on the other side does not have the ability to produce shells, and their shells are all purchased, so when conflicts break out, they will quickly purchase shells from abroad when they fire artillery for a few days.

Lao Ba is stubborn about his own production, but they are not as high-minded as Ah San, and they are still very clear about what they can do.

After reading this tank gun, Lao Ba was already satisfied with the delegation's inspection, and just after sending Lao Ba away, Qin Zhenhua was left by Xie Huimin and others to discuss another important matter.