Inceptor Ammunition has introduced new cartridge offerings loaded with their ARX and SRR projectiles. Particularly, they now offer the defensive/frangible ARX bullets loaded into 10mm Auto and .450 Bushmaster rounds. The SRR bullets are now available for the .223 [Read More…]
In the comments section of my recent Brief Thoughts article regarding caseless ammunition, there was a discussion about whether the cookoff issues of caseless would also be problem for LSAT-style polymer cased telescoped ammunition. Based on conversations I have had [Read More…]
Caseless: The ammunition designer’s holy grail, and the engineer’s worst nightmare. It would obsolete the cartridge case overnight, resulting in cheaper, lighter, and more compact ammunition. Weapons would be able to carry 50, 60, or more rounds in slim, [Read More…]
Idaho company Trom Technologies (formerly PNW Arms) is advertising a new .300 Blackout round that it claims extends that cartridge’s effective range to 900 meters, more than twice the generally accepted 400 meter value for that round. They claim the new round [Read More…]
In the last installment, we talked about the trade-offs involved in increasing or decreasing the projectile’s diameter (and, thereby in convention systems, the bore’s diameter as well). One of the major pieces of the equation that we left out was how [Read More…]
Probably the most obvious element of ammunition design is the choice of caliber, or more specifically the choice of bore and bullet diameter. These two dimensions are of course closely linked in conventional ammunition systems (they can be decoupled with sabots, but [Read More…]
Today we’ll be looking at a round with one of the strangest-looking projectiles ever designed for a military weapon: The joint Heckler & Koch-CETME 4.6x36mm round designed for the HK36 en-bloc clip fed assault rifle. The rifle was, as the name suggests, [Read More…]
Information on this round and the weapons designed to fire it is scarce, so the details in this article may be at times incorrect. Just letting you know. -NF Before the SIG SG 550 was adopted by the Swiss Army as the Stgw. 90, there was another series of rifles, called [Read More…]
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…]
Previously, we discussed trying to lighten the soldier’s load by making the cartridge case out of different materials, including aluminum and compositing the case out of polymer and metal. Yet, wouldn’t the lightest possible case configuration be… [Read More…]
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…]
In the last installment, we talked about the growing need throughout the 20th Century to reduce the weight of the cartridge case, to lighten the burden of the soldier. Experiments in aluminum have thus far proven unsuccessful, but another material is even more [Read More…]
It’s not just the Yanks that are getting improved ammunition: Our friends across the pond have developed their own firepower upgrade for 5.56mm and 7.62mm weapons alike. Jane’s has a modest article on the subject, while The Register provides a quite good [Read More…]
In the mid-1950s, the People’s Republic of China followed the Soviet Union’s example and adopted the intermediate 7.62x39mm round. This decision substantially helped to promote that cartridge’s ubiquity throughout the world, as millions of cheap [Read More…]
Shouldn’t “Modern Full Power Calibers” be its own series? No, because then there would only be two episodes! So instead, we’re rolling today’s two most popular full power .30 cal rounds into the series on intermediates, primarily as [Read More…]
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…]
In the second installment of Ballistics 101, we took a look at the concept of a “ballistic coefficient”, or a drag model based on an empirically tested projectile, against which other projectiles can be measured and compared. Mentioned in that post – [Read More…]
A trend towards ever more powerful and longer-ranged ammunition was cut short by the realities of the First World War: Technologies not previously invented or accounted for, such as the man-reaping machine gun and the portable infantry mortar, made the existing infantry [Read More…]
On my recent article “Ballistics 101: What Is Ballistic Coefficient?”, commenter Anthony asked for clarification on some points: Thanks for the info, but I don’t feel I know what ballistic coefficient is after reading the article. You state, “A [Read More…]
In a recent post, I discussed four ballistics myths that I’ve heard over the years, and why they are just that – myths. One of these was the myth that the momentum of a projectile is equivalent or otherwise indicative of the stopping power of that [Read More…]
The Firearms History blog has posted an anthology of sorts of different videos dealing with modern cartridge manufacture. The manufacture of ammunition is the critical characteristic of modern small arms – huge advances in technology would today be possible, such [Read More…]
The flight of a rifle bullet may seem to be a simple thing – it flies through the air at high speeds, steadily losing velocity and energy until it either impacts the dirt or simply falls out of the sky. In fact, though, there is a lot of complex fluid dynamics to [Read More…]
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