Only three options occurred to me.
1. Trunk defect.
As far as I know, the barrel is still made in Russia. The defect is not only excluded, but disappearingly unlikely.
2. Foreign body in the bore.
The most likely version. The remark that the rupture occurred when leaving the bore is in favor of this version. They scooped up the barrel before the shot and still banged.
3. Poor quality ammunition.
Ammunition is traditionally separate. Those. separate shell and propellant charge.
The propellant could hardly have become a direct cause since it performs its main action in the breech and further, as the projectile moves along the bore and its velocity increases, the pressure of the powder gases decreases, and from the moment of the shot, i.e. separation of the projectile from the bore is quickly equated to atmospheric altogether.
If the fire was fired by live shells, which is possible at the firing range, then it is theoretically possible to talk about the likelihood of an explosive being detonated until the shell detaches from the bore. But only theoretically. In practice, this is also prevented by a fuse equipped with a so-called mechanism. distant platoon. It provides a delay in bringing the fuse to the firing position so that the fired shell can move away from the gun a sufficient distance. Otherwise, if the projectile hits an object that is too close, the gun (tank) and its crew (crew) may be affected by the impact of their own projectile. T.O. the version with an exploding shell is also vanishingly small, provided that the shells are of high quality. But if not, or if, for example, abnormal ammunition, a detonator of their own design, etc. were used, then this version cannot be completely excluded.
4. Combinations of 1,2,3 versions, but not random, but as a deliberate sabotage. This, of course, smacks of conspiracy theory, but it cannot be ruled out.
... the fate of the crew is not reported.
Having searched a little in the Indian press found message that no one was hurt as a result of big bang. Those. There are no victims and injured.
And now attention!
The article indicates the location where the incident occurred.
Pokhran training ground located at 45 km northwest of the city of Pokhran and at 4 km north of the village of Khetolay in Jaisalmer.
Out of habit, I decided to look at this place to check the most likely, in my opinion, version of "scooped the earth with a barrel." Well, such as how rugged the terrain is. And ... oh, horror! At the indicated location, namely, in 4's north of the village of Khetolai, there is nothing other than the Indian Nuclear Test Site. Those. Indian Nuclear Test Site. There you go!
For reference. POLIGON POKHARAN, INDIA
Year of appearance: 1974.
The first nuclear tests in India took place in the 1974 year, at the Pokharan training ground. It is located on the territory of the densely populated state of Rajasthan, since the foundation the training ground has been a serious threat to local residents. In many ways, the formation of the training ground was facilitated by a long-standing military conflict with Pakistan. In 1998, the largest series was conducted at the Pokharan training ground, five nuclear shells were blown up here. Currently, the landfill is a protected enclosed area, explosions in its territory are no longer carried out, but used for other tests.
Here, the military is practicing bombing techniques, as well as various methods of using nuclear weapons. It is important to note that India is one of the few states in the world with a nuclear triad. This country has at its disposal all possible means for delivering nuclear bombs: airplanes, special submarines, as well as ballistic systems. Like many other polygons in the world, Pokharan remains the most secret to date. Many advanced countries receive information about it only images from space satellites.
In 2000, the images obtained from the IKONOS-2 satellite were published. In these images, plots of soil subsidence that occurred after the next series of tests are visible. Even in the pictures, the buildings that could serve as the entrance to the underground tunnels are distinguishable. At this training ground, the most powerful stories Indian nuclear projectile, according to experts, its power was not less than 20 ct, and some researchers argue that the power of the explosion was not less than 30 ct.
So everything may not be as easy as it seems at first glance.
But what if the Indians try to shove nuclear munitions into the 125-mm projectile and an abnormal situation arises when testing the prototype?