Not to mention the pressure, the principle of the gun chamber is to use pressure to push the bullet out, and it will fly for a kilometer or two.

The primer detonates the gunpowder and produces a high-pressure gas that can increase by more than 1200-3000 kg/cm2 in an instant.

The average chamber pressure is also 400-500 kg/cm².

If the temperature of the ice bomb is low, or if the hardness is poor, it will fail to fire.

The ice bomb that has just been taken out of the low-temperature liquid nitrogen reservoir is afraid of melting, and the plum blossom also needs to be launched quickly.

Because normal temperature is equal to high temperature for ice bombs.

In order to freeze this bullet, the K-shaped family got a multi-ton instrument.

After calculating the distance and wind speed, the club attaches the cheek to the butt.

Then he framed the cross ten centimeters on Wang Feng's head, and said lightly:

"Brother Spades, go all the way! I'm going to take revenge on you! ”

"Boom!!"

The anti-materiel sniper rifle exploded, and a crystal bullet erupted rapidly.

The outer layer of the ice bomb partially dissolved, and it flew towards the figure in the armed police car.

Ice bullets have less mass and less kinetic energy than metal bullets, so they may not be able to fly far and are prone to derailment.

This is also the reason why Meihua can beat Wang Feng two kilometers away, but he has to run in front of him.

……

"Brother Feng, why hasn't there been a reaction inside? I've seen a couple of prisoners here, so I'm going to shoot them! ”

Liu Yong looked at it with a telescope for a long time, and there was chaos in the bungalow.

Moreover, the windows are small, so there are very few opportunities for the armed police.

The other party is another five people, and if this one is killed, the other hostages may be victimized.

"No! In the absence of certainty, you can't shoot rashly! ”

Wang Feng found that there was nothing to see in the bungalow.

Rather, it was the "common people", some of whom were shirtless.

There were traces of white powder on his shoulders, and Wang Feng suddenly found that one person's shoulders had been wiped clean unintentionally.

"Hearts Clown?!"

After Wang Feng saw the tattoo on his shoulder, he was slightly shocked.

On the hands of the "commoner", there was a hideous clown.

The clown has a big red heart drawn on his face, which is a red heart.

"Huh? …… What's going on? ”

Wang Feng muttered and frowned.

This...... The person who needs protection is still the clown, and what is the suspect in it? Another group of bad guys?

Wang Feng felt that this was unlikely, and the suspect with the gun was very excited, and he seemed to be yelling there: "I'm going to kill K, I'm going to kill K!" ……”

I was so excited that I couldn't hear the rest of the words clearly.

Liu Yong heard Wang Feng's muttering, and then looked:

"Hey! Good guys, who's the bad guy?! Caught the wrong person?! ”

"That's not right! Remove! ”

"Yes!"

Wang Feng just finished yelling and pulled Liu Yong away from the roof of the car, "Ding! With a bang, a large hole appeared in the position where Wang Feng was staying on the roof of the car.

Then there was a loud "boom" in the distance.

The metal of the roof is deeply dented.

"Enemy attack!!"

Liu Yong yelled, and all the police hid behind the car.

"Nothing?"

Wang Feng checked the roof of the car, and there were no bullets in the sunken metal pothole.

"What's going on?"

Liu Yong frowned, the roof of the car was obviously deeply sunken, and this would only happen when a bullet hit.

"Ice bombs?"

Wang Feng found a little bit of ice slag in the corner, the temperature of the ice slag was extremely low and it was still smoking.

"Didn't scientists say that ice bombs are almost impossible to make?"

"Don't worry about that! Help me find the enemy's location! ”

Wang Feng stared at the modern buildings four hundred yards away, the enemy must be among those buildings!

"Get out of the way!"

Wang Feng follows the sniper's attack interval.

Quickly pushed Liu Yong away, and jumped to the side himself, but nothing happened.

"Liu Yong, have you found it?!"

"Not yet! There were too many families in that building. ”

Liu Yong holds a military binocular, looking for a sniper.

"See! Eleven o'clock, one fifth, half a block to the right. ”

He discovered the enemy's position, deriving the firing position using the usual calculations.

An experienced observer will calculate the following firing points within three seconds:

Liu Yong uses a scope or telescope equipped with millimeter scales for observation, as well as a laser rangefinder.

The distance to the target is calculated by using the height of the target on the scale, and the equation is as follows:

The true size of the target (m) x 1000 / the size of the target on the scale (mm) = the distance of the target.

After the distance is determined, it is calculated based on personal experience and judgment.

If the enemy's location is at a high altitude, it will seem to be a little farther away, even in dusk and fog.

On the contrary, a lower altitude gives the illusion of being closer.

In Wang Feng's heart, this "Red Spear King" is always the first secret position on the right side of the crosshairs.

Over the years, Wang Feng has used sniper bullets to shoot in five figures, and it is estimated that there are more than 30,000 rounds.

In the year of wilderness training, Wang Feng fired 10,000 rounds, an average of 300 rounds a day.

Calculate and adjust the preload according to the enemy's distance, wind speed, gravity, and movement speed.

In the case of quick calculations, humidity and the deflection force of the Earth's rotation are generally not taken into account.

Liu Yong's wind speed calculation formula:

Wind direction and speed, using some indicators as measurement tools.

For example, flags, smoke, trees, grass, raindrops, and how you feel.

The most common method is to use flags, where the sniper estimates the angle of the windblown flag to the flagpole.

Then divide the angle by a constant of 4 and multiply it by 1.6, and the answer is the approximate wind speed.

For example, if the bottom edge of the flag is at an angle of 60 degrees to the flagpole, the wind speed is about 60/4x1.6=24 km/h.

If there is no flag to observe, the sniper can take a piece of paper, grass, cotton or other light objects and let go, then point to the object landing point, and use the angle formed by the arm and body divided by 4 times 1.6, and the answer is more accurate.

Convert wind speed to minute angle:

1 minute angle = 1/60 degree, which is also equal to 1/20 of the scope scale, which is about 20 mm deviation per 100 meters, the sniper uses the minute angle to adjust the aiming angle, when the sniper knows the wind speed and wind direction, the sniper should immediately convert this information into the minute angle, the equation is:

Range (m) / 100x wind speed (km/h) == minute angle. Constant:

The constants for different distances refer to the following data: 100-500 m constant = 15 , 600 m constant = 14 , 700-800 m constant = 13 , 900 m constant = 12, 1000 m constant = 11

For example, the target is 700 meters, the wind speed is 10 kilometers per hour, and the minute angle is:

（700/100）x10 ==5.38 。

"Click!"

Wang Feng withdrew a bullet and found the location of more than ten floors, and the glass window had a circular vent.

Inside the vent was a pitch-black "steel pipe".

I guess this thing is a large-caliber sniper rifle! I just don't know who the enemy is, Wang Feng guessed that it was from the K-shaped family!

After receiving the information that Dongyudong had been attacked, Chief Zhu of the headquarters immediately ordered:

"Firearms attack police, unknown prisoners. Hole hole, allow counterattack! ”

"Yes!"

—End of Chapter—

Thank you for the big 500 points reward of "Great War Lu Bu"!