The Luftwafa engineers who created this bullet did not plan to kill people. In their drawings, it was just an optical instrument, a harmless aid that was supposed to hit the ground and leave a neat white cloud of smoke so that the pilot could adjust his sights. But the war didn’t care about the designer’s intentions.
Soldiers on the front lines quickly realized that what made a beautiful cloud on the ground did terrible things inside the human body. They turned an aviation tool into a nightmare for the infantry. A bullet that exploded inside its victim, turning a single hit into a guaranteed and painful death. By 1944, both sides of the Eastern Front were firing such bullets at each other, and both sides knew the unspoken rule.
A sniper caught with these cartridges in his pouch could not count on being taken prisoner. He would be shot on the spot for sadism. This is the story of the B Patron, the ammunition that turned a sniper duel into an execution. the story of how a harmless aviation tool became the black mark of the infantry.
And to understand how technology defeated humanism, we need to go back to a time when war was still trying to appear noble. From its earliest months, the Eastern Front existed according to laws that had nothing to do with the conventions signed in the peaceful halls of European capitals. However, even by the standards of this war, what German snipers encountered beginning in 1941 was something new.
Soviet shooters began to use tracer and incendiary cartridges originally developed for the rapid firekas aircraft machine gun and use them against live targets. These bullets were created for the same purpose as the German batrono, namely to correct fire in the air. But someone on the Soviet side discovered that when they hit a person, they had a completely different effect.
Austrian mountain rifleman Ysef Alabburgger, who later became the Vermach’s second most effective sniper and one of the few privates to be awarded the Knight’s Cross, experienced the consequences of these hits firsthand. On the southern section of the front, two company commanders were killed in a matter of seconds. barely having time to raise their binoculars to their eyes.
The wounds left by these bullets made identification a formality. These were not neat through holes from a conventional pointed bullet, but devastation after which the comrades of the killed soldier had to make an effort to continue the task. German snipers found themselves in a situation for which the regulations provided no instructions.
The enemy was firing ammunition that not only killed, but turned every hit into an act of intimidation for everyone nearby. And responding with a conventional SS bullet meant playing by the rules in a game where the other side had already abandoned the rules. The problem was that the German army already had an answer.
It had been lying in boxes in Luftvafa warehouses since the mid 1930s, packed in cardboard boxes labeled 15B Patronin. The 7.92x 57 mm cartridge was almost indistinguishable from standard ammunition except for its blackened bullet and black sealant on the cap. It was perfectly suited to the CAR 98K carbine, the Vermach standard sniper rifle, and required no modifications to the weapon.
The solution was literally at arms length. But between the sniper and this cartridge stood the St. Petersburg Declaration of 1868. It was the first international agreement in history to ban a specific type of weapon signed by 17 states including Russia and Prussia. The declaration prohibited the use of projectiles weighing less than 400 g that were explosive or equipped with incendiary substances.
The logic behind the ban was simple and indisputable. If a conventional bullet can incapacitate a soldier, then a bullet that explodes inside him does not make war more effective, but only makes it senselessly cruel. The HEG conventions of 1899 and 1907 confirmed and expanded this principle. The use of B patron against human targets was a war crime and regular infantry units of the Vermacht were not allowed to use this ammunition.
However, Allerburgger did not wait for permission from above. He began collecting captured Soviet incendiary bullets from the bodies of dead Red Army soldiers and using them in a captured Soviet Mosen Nagant sniper rifle with a PU optical sight. This was not an order or sanction from the command, but a personal decision by a soldier who saw every day what such bullets did to his comrades and decided that fighting with gloves against an enemy who fought with his bare fists meant losing.
He reserved the captured ammunition for exceptional cases because it was hard to obtain, and he understood perfectly well what he risked if he were captured with it in his pouch. But on the Eastern Front by 1943, the prospect of capture for a sniper was rather theoretical. Snipers, as a rule, were not taken prisoner, regardless of what ammunition was found on them.
To understand why the B patron caused such horror, you need to look inside this bullet. Because it was there in a space slightly larger than a thimble that German engineers fitted a mechanism that turned a harmless correction tool into something prohibited by international law. The bullet weighed 10.
85 g and looked almost identical to a standard bullet. However, inside it was a miniature system that worked on the principle of an inertial fuse. When fired, the freely floating striker was accelerated back and thus cocked. The bullet left the barrel at a speed of 800 meters/s, and all this time, the striker remained in the rear position, held by its own inertia.
At the moment of impact with the target, there was a sharp deceleration and the striker by inertia rushed forward and struck a small capsule of tetrol which is a powerful brisant explosive. The detonation of the tetrol ignited the white phosphorus placed in the nose of the bullet. When this happened upon impact with the ground or the aircraft’s skin, the result was a bright flash and a cloud of white smoke about a meter in diameter, clearly visible from a kilometer away.
This was precisely what the Beep Patron was designed for, as described in the documentation, and what made it a useful tool for Luvafa machine gunners. But when the same bullet hit a human body, physics worked differently. Soft tissues slowed the bullet down enough for the mechanism to work, but did not stop it instantly.
Detonation occurred at a depth of 100 to 130 mm inside the body. The bullet did not pass through like a regular SS, which left a relatively clean entry and exit wound and gave the wounded a chance to survive. The bipatron detonated inside the body and the white phosphorus which created a harmless cloud of smoke in the open air turned into a source of thermal and chemical damage to the organs in the confined space of the human body.
Alberger testified that one such cartridge was enough to break a tree trunk 5 cm thick. It is not difficult to imagine what it did to anything softer than wood. For a long time, the use of the B patron remained the personal initiative of individual snipers who acted at their own risk using either captured Soviet equivalents or cartridges obtained through unofficial channels from aircraft depots.
But in March 1944, according to a staff document referenced by weapons historian Peter Senich in his work, the German sniper 1914 to 1945, the situation changed. A memorandum was signed authorizing the official issuance of B patron to Vermacht snipers. This document is notable not only for what it allowed, but also for the restrictions it imposed.
The cartridge was authorized exclusively for the Eastern Front. If a division received orders to transfer to the west, the sniper was required to surrender all B patron cartridges in his possession. On the Western Front, where the Germans fought against the British and Americans, these cartridges were not used.
The Eastern Front existed in its own moral dimension where the rules that were still poorly observed in the west had long since lost their force. The B patron became a kind of marker of this boundary, a physical embodiment of the fact that the war in the east was fought by different rules. The standard issue was 20 B patron cartridges per sniper compared to 90 regular cartridges.
20 out of 110, less than a fifth of the ammunition supply. Each such cartridge required a conscious decision from the shooter. Was the target important enough to spend one of 20 on it? And each such cartridge in the pouch was both a weapon and a sentence for its owner because both sides knew the unspoken rule of the Eastern Front.
A sniper captured with blackened cartridges could not count on prisoner of war status. However, snipers on the Eastern Front were rarely taken prisoner even without this. The night of March 25th to 26th, 1944, the positions of the German division, which had been holding the defense after a week of relative calm, Soviet assault groups broke into the trenches.
And in the chaos of close combat, Allerberger saw what he was looking for through his optics. A white cap flashing above the parapit at the junctions of the trenches. The officer coordinating the attack. The sergeant acting as an observer confirmed the target and tracked its movement. Zap, he’s running to the right.
Can you see part of his cap above the edge? Alger loaded a burst cartridge. Not because a regular bullet couldn’t kill this man, but because the silhouette flashing between the shelters had to be hit once, and that one shot had to guarantee the result. One shot. The commander fell. The attack having lost control faltered.
But Allerberger used the B patron not only for the precise destruction of key targets. His memoirs describe a technique in which the explosive bullet performed a completely different function. During massive Soviet attacks, he fired explosive cartridges at the bodies of the first waves of attackers. People fell and did not die instantly.
They screamed in pain, which could last for minutes. And this sound had a stronger effect on the attackers than machine gun fire. The comrades of the wounded slowed, hesitated, lost momentum in the attack and eventually retreated. In Alerburgger’s hands, the B patron worked not so much as a means of destruction as an instrument of psychological suppression.
And therein lay its true and most sinister effectiveness. In another episode, Allerburgger single-handedly thwarted an armored infantry attack using captured Soviet explosive cartridges. He fired accurately through the viewing slits of American M3 halftrack armored personnel carriers supplied to the Soviet Union under the Lendley program, hitting the drivers of the vehicles at a distance of less than 100 m.
An explosive bullet that entered the armored hull through a narrow slit left the crew no chance. The vehicle stopped one after another, and the attack intended to crush the German defenses fell apart. The authorization to use the B patron did not give the German side any strategic advantage. It only leveled the playing field in a race of brutality that could not be won.
The Soviet side responded predictably, expanding the use of its own armor-piercing incendiary ammunition far beyond sniper units. These bullets began to appear in machine gun belts and regular infantry magazines. Both sides accused each other of being the first to violate the conventions. And both sides were right in their own way because by 1944 it was already impossible and indeed pointless to determine who had started it.
The escalation followed its own logic in which each subsequent step seemed a justified response to the enemy’s previous one. Perhaps the most vivid illustration of what an explosive bullet did to the human body remains an incident that occurred even before the Eastern Front in another war and on another theater of operations. On March 6th, 1940, a week before the end of the Soviet Finnish winter war, Finnish sniper Simo Hiha, who had more than 500 confirmed enemy soldiers to his credit, was hit in the lower part of his face by a Soviet fragmentation bullet.
The bullet shattered his lower jaw, blew off his left cheek, and destroyed a significant portion of his upper jaw. The soldiers who found him reported that half of his face was missing. Hika was presumed dead and placed on a pile of bodies until someone noticed that his leg was moving. He survived, but his recovery took 14 months and 26 operations.
His face remained disfigured for life. It was one bullet, one shot, one hit, and it was enough to turn the most successful sniper in history into a man unrecognizable to his former comrades. On the Eastern Front, this happened every day on both sides. The bullet, designed to create a cloud of smoke over an airfield training ground, became a common tool in a war where the concept of prohibited weapons had lost all practical meaning.
Today, the B Patron exists as a collector’s item. Original cardboard boxes labeled 15 B patronin and factory markings occasionally appear at military history auctions. In most European countries, these cartridges are classified as explosives and are prohibited from free circulation, which is remarkable in itself for 7.
92 mm caliber ammunition. Collectors who have held this cartridge in their hands describe one characteristic detail. If you take it and shake it slightly, you can hear a quiet tapping inside the casing. Because that very floating striker, a tiny piece of metal on which everything depended, still moves freely inside the bullet, tapping against the glass ampule with tetril.
80 years later, the mechanism is still intact. It does not care how much time has passed. And the 1868 St. Petersburg Declaration, the very document that the B patron violated every time it was used against a human being remains a valid norm of international law. The principle laid down in it was incorporated into the HEG conventions then into the Geneva protocols and ultimately formed the basis of the entire modern architecture of humanitarian law.
And therein lies perhaps the greatest irony of the whole story. The declaration was initiated by the Russian Empire, the country that first created the explosive rifle bullet and was the first to propose abandoning it. 73 years later, the Soviet Union, its successor, became the first party to use similar ammunition on a massive scale against human forces on the battlefields of World War II.
On the 140th anniversary of the St. Petersburg Declaration. The president of the International Committee of the Red Cross, Jacob Kellenburgger, said that the people who drafted this document did something that none of us should forget. They drew a line in the sand regarding the means and methods of warfare, a line beyond which, if crossed, any notion of humanity disappears from war.
The history of the B patrona shows how such a line is erased. Not by a single decision or a single order, but gradually by a logic that seems flawless to each participant. One side decides that it can do so because the enemy is already doing it. The other side makes the same decision on the same grounds and both are sincerely convinced that they are only responding.
An 11 g cartridge designed to leave a harmless white spot on the ground became a death sentence for both those it hit and those who found it. One can argue about who violated the convention first. But B patron proved one thing that is beyond dispute. When a line is crossed in war, there is no turning back.
