1. The 9x19 mm Parabellum : the undisputed king of pistols
Designed in 1902 by Georg Luger, the 9x19 mm – also known as 9 mm Parabellum or 9 mm Luger– is today the most widespread pistol caliber in the world.
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Military and police use : adopted by NATO, it equips the majority of armed and police forces.
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Advantages : an ideal compromise between stopping power, recoil control, and magazine capacity.
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Civil presence : popular in sport shooting and personal defense.
Its widespread distribution is due as much to its ballistic qualities as to a well-established global logistics: it is produced everywhere and available at competitive prices.
2. The .22 Long Rifle : the essential of recreational shooting
Created at the end of the 19th century, the .22 LR remains one of the most produced cartridges in the world.
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Usage : recreational rifles, competition pistols, military training.
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Strengths : very low cost, almost no recoil, limited noise.
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Limits : lack of power for big game hunting or military use.
Its accessibility and versatility explain why it is often the first caliber used by beginner shooters.
3. The 5.56x45 mm NATO : the cartridge of modern assault rifles
Adopted in the 1960s by the United States with the M16, the 5.56x45 mm has become the norm in most Western armies.
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Characteristics : high speed, tight trajectory, light ammunition allowing for carrying more cartridges.
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Debates : Some criticize its stopping power as being inferior to the 7.62x51 mm NATO, but its lightness remains a major tactical advantage.
Today, it equips most of the assault rifles in service in NATO member countries.
4. The 7.62x39 mm : the Soviet legacy
It is the iconic caliber of theAK-47and its derivatives. Developed at the end of the Second World War, it is still widely used in Asia, Africa, and Eastern Europe.
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Strengths : robustness, close combat efficiency, mass production.
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Diffusion : thanks to the Cold War, this caliber spread worldwide, supported by decades of Soviet and Chinese production.
It remains extremely common in the civilian and military market, with almost universal availability.
5. The 7.62x51 mm NATO / .308 Winchester
Adopted by NATO in the 1950s, this caliber remains a staple for sniper rifles and certain machine guns.
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Strengths : excellent accuracy, effective range, significant stopping power.
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Applications : snipers, big game hunting, civilian precision firearms.
Its civilian version, the .308 Winchester, is very popular among hunters and sport shooters worldwide.
6. The December 1970 : the reference for hunting rifles
The 12 gauge with 70 mm cartridge is probably the most widespread hunting ammunition in the world.
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Versatility : exists in a multitude of loads (shot, buckshot, bullets).
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Usage : hunting, sport shooting (trap, skeet), home defense.
Its simplicity and effectiveness make it a universal standard, well beyond the circles of hunters.
7. The .45 ACP: The American Icon
Designed for the Colt 1911, the .45 ACP (Automatic Colt Pistol) has remained iconic in the United States.
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Qualities : large projectile, noticeable but tolerable recoil, effective at short range.
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Current usage : still present in certain special units and highly valued in the American civilian market.
Although it does not have the same global distribution as the 9 mm, it retains a strong historical and cultural aura.
Conclusion: a balance between history, logistics, and efficiency
The most common calibers in the world owe nothing to chance. Their success is due as much to their technical qualities as to historical and political factors. The 9 mm Parabellum and the 5.56x45 mm have become military standards thanks to NATO, while the 7.62x39 mm has established itself through the Soviet sphere. The .22 LR and the 12 gauge owe their success to their versatility and low cost, while the .308/7.62x51 remains a benchmark for precision.
Ultimately, these dominant calibers reflect a constant compromise: power, availability, cost, and tradition.
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