When it comes to sheer size and firepower, the 4 Bore rifle stands as an apex predator in the world of shoulder-fired firearms. Scott DeShields Jr., host of the popular YouTube channel Kentucky Ballistics, introduced this behemoth in a video and called it “the biggest, most ridiculous shoulder-fired rifle ever created,” and for good reason. This rifle, designed for dangerous game hunting, fires a massive 2,150-grain projectile, a bullet roughly the size of a Campbell’s soup can, and generates a staggering 200 pounds of felt recoil.
“A Shoulder Mounted Artillery Piece”

Danger Bob from Military Armaments Company referred to it as “a shoulder-mounted artillery piece,” underscoring its history as a tool for taking down the largest, most dangerous animals in colonial Africa. Meanwhile, orthopedic surgeon and creator Dr. Chris Raynor marveled at the rifle’s destructive power in his reaction video, providing a unique medical perspective on what such weaponry can do to the human body – or ballistic test dummies, in this case.
The History of the 4 Bore Rifle

Danger Bob traced the origins of the 4 Bore rifle to pre-1890s Africa, where it was essential for hunting elephants with black powder. Back then, firearms relied on mass and diameter rather than speed to penetrate thick hides and bones. The “4 Bore” designation refers to the size of its bore, with the term “bore” indicating how many spherical lead balls of the same diameter would equal one pound. In the case of the 4 Bore, only four balls made up a pound, resulting in a truly monstrous caliber.
The Evolution

Over time, as smokeless powder became available, these rifles evolved, allowing for faster projectiles with modern powders. John Ross, a prominent figure in the gun world and author of the cult novel Unintended Consequences, commissioned a 4 Bore rifle built with smokeless powder capabilities. This iteration, now in Danger Bob’s possession, pushes a nearly 1,800-grain bullet at velocities approaching 2,200 feet per second. The recoil? A bone-crushing 300 pounds of force.
Anatomy of the 4 Bore Rifle

The 4 Bore rifle Scott DeShields showcased was custom-built by Christian Firearms and features a falling block design, which Danger Bob described as being reminiscent of “small artillery.” Weighing over 20 pounds, the rifle is not just a weapon – it’s a statement. A single shot requires the user to manually load the massive round by lowering a block, inserting the cartridge, and locking it back into place. For comparison, DeShields lined up the 4 Bore round alongside others, from the relatively diminutive 9mm to the massive .50 BMG. None came close to the sheer size of the 4 Bore round.
Testing the Limits: Steel, Cinder Blocks, and Body Armor

In his video, DeShields put the 4 Bore through a series of tests against AR500 steel plates, cinder blocks, and even cans of old pudding and cheese. The results were nothing short of apocalyptic. The rifle shattered cinder blocks, dented hardened steel, and sent its targets flying backward with incredible force. “I’ve shot cinder blocks before,” DeShields said, “but I’ve never seen them explode like this.”
Dr. Raynor provided a medical perspective on the effects of the rifle’s force, comparing the energy transfer to “an anime punch” capable of vaporizing flesh and bone. Testing the 4 Bore against ballistic dummies wearing body armor, DeShields demonstrated that while the armor might stop the bullet, the sheer energy would devastate internal organs and bones, often rendering the armor’s protection moot.
The Science of Destruction

Dr. Raynor explained how the massive kinetic energy of the 4 Bore translates into catastrophic injuries. Unlike smaller, faster projectiles, which rely on penetration, the 4 Bore delivers overwhelming blunt force trauma. This effect was vividly demonstrated when a ballistic dummy’s torso split open under the impact, its “ribs liquefied and lungs vaporized,” as Dr. Raynor described it.
Danger Bob highlighted how modern rounds for the 4 Bore are meticulously crafted to withstand the incredible forces generated. Each round features reinforced brass walls and steel bases to ensure they can handle the immense pressure without failing.
Can’t Fight the Recoil

Both DeShields and Danger Bob remarked on the sheer challenge of firing the rifle. With recoil equivalent to being kicked by a horse, the 4 Bore is not for the faint of heart. Danger Bob shared his experience, stating that even seasoned shooters often manage only one or two shots before calling it quits. “If you try to fight the recoil, you’ll lose,” he warned.
DeShields echoed this sentiment, describing how his shoulder bore the brunt of every shot during his testing. Yet, despite the punishment, he expressed an almost gleeful fascination with the rifle’s power.
A Surgeon’s Take

Dr. Raynor’s analysis brought a unique perspective to the discussion. From fractured ribs to catastrophic internal bleeding, he methodically broke down the anatomical devastation caused by the 4 Bore. He noted that while body armor might contain a bullet, it couldn’t stop the immense energy transfer, likening the resulting injuries to a car crash.
What I found particularly interesting was Dr. Raynor’s ability to weave humor and insight into his explanation. His description of the “makeshift wound packing” effect of body armor was as entertaining as it was chilling.
Legacy of the 4 Bore Rifle

The 4 Bore rifle is more than just a firearm; it’s a piece of history. Its origins in colonial hunting, its evolution with modern technology, and its place in popular gun culture today make it a fascinating artifact. As Danger Bob pointed out, owning such a rifle is a privilege that requires a deep appreciation for its engineering and legacy.
Awe and Respect

As someone who loves exploring the intersection of history, engineering, and sheer spectacle, the 4 Bore rifle is mesmerizing. Watching DeShields, Danger Bob, and Dr. Raynor interact with this weapon highlighted not only its power but also the careful balance of respect and caution it demands. It’s easy to be drawn in by the explosive visuals, but the human toll of such weaponry is equally humbling.
The Power of Collaboration

What makes the 4 Bore rifle so fascinating is its unique combination of history, engineering, and spectacle. Watching it in action, it’s impossible not to marvel at its sheer size and power, but there’s also a sense of gravity that comes with seeing its potential for destruction. The collaborative insights from Scott, Danger Bob, and Dr. Raynor help to round out this perspective, offering a multi-faceted view of what this weapon represents. It’s not just about the explosive visuals or the recoil that kicks like a horse – it’s about understanding the context, the craftsmanship, and the consequences.
A One-of-a-Kind Icon

Whether you see the 4 Bore rifle as an engineering marvel, a historical relic, or simply an over-the-top showpiece, it’s impossible to ignore its impact – literally and figuratively. The 4 Bore rifle stands as an emblem of the extreme – pushing the boundaries of what a shoulder-fired firearm can achieve. It’s more than a weapon; it’s a symbol of human creativity, innovation, and our relentless pursuit of power.
From its origins as a tool for survival in the untamed wilds of colonial Africa to its modern iterations, it represents an era when hunters faced nature’s most formidable creatures with courage and ingenuity.

A former park ranger and wildlife conservationist, Lisa’s passion for survival started with her deep connection to nature. Raised on a small farm in northern Wisconsin, she learned how to grow her own food, raise livestock, and live off the land. Lisa writes about homesteading, natural remedies, and survival strategies. Whether it’s canning vegetables or setting up a rainwater harvesting system, Lisa’s goal is to help others live more sustainably and prepare for the unexpected.