Tag: bullet

Werner Tool Company - 660x300 Lehigh Defense bullet Even within the same ammunition system, different projectile weights have a massive effect on external and terminal ballistics. Here we see some of the different weight bullets available in the 5.56x45mm caliber. 7.65x35mmMAS Four PDW calibers: .22 WMR (Kel-Tec CMR-30 and PMR-30 SMG), .22 SCAMP (Colt SCAMP), 5.7x28mm FN (FN P90), and 4.6x30mm HK (HK MP7).

Modern Personal Defense Weapon Calibers 002: The 4.6x30mm HK

If the 5.7x28mm FN is the first successful modern PDW round, then the 4.6x30mm HK is the second, and its biggest rival. German firm Heckler and developed the microcaliber 4.6mm in the 1990s as a response to a NATO solicitation for a Personal Defense Weapon, to which [Read More…]

Four PDW calibers: .22 WMR (Kel-Tec CMR-30 and PMR-30 SMG), .22 SCAMP (Colt SCAMP), 5.7x28mm FN (FN P90), and 4.6x30mm HK (HK MP7).

Modern Personal Defense Weapon Calibers 001: Introduction, and the 5.7x28mm FN

At this point, we’ve talked about 25 different intermediate and full power calibers as part of a series comparing different types of modern small arms ammunition. However, one subject not yet thoroughly covered is rounds for personal defense weapons (PDWs). These [Read More…]

Left to right: 4.9x45mm DAG, 4.3x45mm DAG, 4.6x36mm HK/CETME, 4.7x21mm HK early G11, 4.7x33 HK late G11, 4.6x30 HK MP7 Left to right: 7.65x38mm Swiss, 7.5x55 GP.11, 6.45x48mm GP.80, 5.56x45mm SS109 0919161710cmod2 gerrperrscherr

Where to Draw the Line? Managing the Weight of Next Generation Universal Calibers Using a Weight Calculator

How can one balance the trade-offs inherent in ammunition design to create a true one-caliber infantry weapon system that is both effective and lightweight? This is a question I’ve been exploring for close to a decade, and writing about for over four years. The [Read More…]

.264 USA The long-necked Colt 7.62mm round on the left combines the principles of triplex and squeezebore rounds (together called "salvo-squeezebore"). When fired from a modified M60 with a tapered muzzle, it would spit out three 55gr .224" caliber projectiles per shot. In the center is the duplex (not squeezebore) M198 7.62mm round, and on the right is the M80A1 EPR round, for comparison.

Future Firearms Ammunition Technology 007: Squeezebore Ammunition – Celeritas Et Accuratio

Previously, we discussed the benefits of and challenges facing saboted projectile ammunition, including the advantages of decoupling the diameters of the bore and the projectile, and the problems of accuracy during sabot discarding. One concept that could possibly [Read More…]

Multiplex rounds, left to right: .30-06 long neck duplex, .22-06 long neck duplex, .25 Winchester FA T115 short neck duplex, .25 Winchester FA T127 long neck duplex, Colt 7.62 salvo squeezebore triplex, 7.62mm M198 duplex ball, 9.53x76mm Winchester quadruple flechette, .330 Amron Aerojet triple flechette.

Future Firearms Ammunition Technology 006: Multiplex Projectile Ammunition – Two, Three, Four for the Price of One?

After World War II, US Army analysts determined that the effectiveness of the infantryman was not as closely related to their marksmanship discipline as had been previously thought. It seemed that instead, the random environmental circumstances and effects, plus the [Read More…]

Sabot rounds, left to right: XM645 SPIW flechette with compressed disintegrating puller sabot, XM645 SPIW flechette with glass polyester disintegrating puller sabot, 5.77/4.32 Frankford with polymer cup pusher sabot, 5.56x45mm AAI ACR flechette with petal-type puller sabot. Far right is a pulled SPIW sabot and flechette.

Future Firearms Ammunition Technology 003: Sabots – Performance-Enhancing Shoes for Your Bullets

One of the problems of small arms ammunition is that of swept volume. That is, the most ballistically efficient projectiles are the longest and thinnest ones, which cut through the air more easily than squatter, fatter projectiles. Yet, the best projectiles from a [Read More…]

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Modern Historical Intermediate Calibers 020: The 7.62x45mm Czech

After World War II, the nations of the world retired to lick their wounds and rebuild, but their arms engineers also began thinking about the next war. The war have brought forth a storm of new technologies and inventions, and one of the most significant in the field of [Read More…]

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Modern Intermediate Full Power Calibers 019: The Russian 6x49mm Unified

What happens when you take the two concepts of a traditional, full-power rifle and machine gun round, and a small-caliber, high-velocity round, and smash them together? You get one of the most extreme military small arms calibers ever developed, and one of the last [Read More…]

5.8x42DBP-10 On the right are two types of 7.62 NATO round, the M80 and M80A1, alongside two of its predecessors. Center left is the .30 T104 ball cartridge using the 1948 T1E1 case. Left is the .300 Savage, which was the starting point for what became the 7.62 NATO. The 4.85 British (center) was developed in the UK and competed in the NATO trials that eventually standardized on the Belgian 5.56mm SS109 load (left). Like the similar German 4.9x45mm DAG (right), it is based on the 5.56mm case. 0810162235bn On the right are the two major iterations of the 6mm SAW, the 45mm steel cased version, and the 50mm aluminum cased version. In the middle is a modified .25 Winchester experimental round used for ballistic testing in the early part of the SAW program. On the far left is 5.56mm M855, which became the eventual chambering for the resulting M249 SAW. The 6x35mm KAC/TSWG flanked by its parent, the .221 Remington Fireball on the left, and the 5.56x45mm on the right, which it is designed to duplicate from shorter barrel lengths. A 5.45x39mm 7N6 cartridge, flanked by two of its predecessors. The 5.6x39mm (left) was developed from an early Soviet ballistic test round using the 7.62x39mm case head, which was designed to duplicate the performance of the early .222 Remington Special (right), later renamed the .223 Remington. 7.62x40 WT next to its parent, the 5.56mm. 7.62x39mm170gr

Exploring the Untapped Potential of 7.62×39 as an “All Around” Hunting Caliber

What if there was a caliber that was suitable for everything from coyote to brown bear, kicked less than your whitetail gun, fit in a micro-length (2.25″/58mm) action, and cost a quarter a round to shoot? That would be a pretty awesome caliber, wouldn’t [Read More…]

That is what happens when a wound channel collapses on itself so quickly that it sets the air on fire. BCs .30 caliber rounds: .30-06 M2 AP, .303 Mk. VII, 7.5x54 Balle C, 7.9x57 sS Patrone, 7.62x54R LPS Ball, 7.62x51 NATO S Patrone (Austria). BCs 13115377_10207705348445477_1764901318_n PHOTO_20160427_224237 0831150951c22 9mm bullets Bullet Art Browining fail cutaways5070 2248e8c664e6e8327a85476eb731f8e8_large IMG_0013b
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Prototype RusEngin Bullet

A Russian inventor emailed me photos of his patent-pending bullet design. These bullets are loaded in 12.7×108mm cases. The inventor did not explain to me how this design is beneficial but according to a study done by the US Military in the 1950s (PDF Link), the center [Read More…]