Category: The Green Machine
I was amazed to find that “Stonewall” Jackson was only 39 years old when he died from his wounds!! Grumpy
Few firearms have captured a nation’s spirit quite like John Moses Browning’s vaunted M1911. Rugged, reliable, cleverly engineered, and utterly lethal, this homegrown handgun is as American as baseball and blue jeans.
Yet, what would the legendary 1911 be without the potent and equally loved .45 ACP cartridge that Browning designed to go with it?
Even though it’s dubbed “the Lord’s caliber” thanks to its widespread popularity – and dare I say, righteous stopping power – I feel we’ve come to take the .45 ACP a bit for granted these days. Here’s a closer look at the story behind a pistol cartridge that helped define American small arms for over a century.
Table of Contents
.45 ACP History
Basic Ballistics & Specs
Pros & Cons
Final Thoughts
.45 ACP History
Developed in 1904, the story behind the .45 Automatic Colt Pistol (commonly .45 Auto and .45 ACP) is tied directly to America’s rise to prominence on the world stage. While the genius of the cartridge came squarely from the mind of Browning, it was actually the U.S. Army that determined the need for a .45-caliber bullet.
This owed much to two factors. First, America’s cavalry at the turn of the 19th century was on the hunt for something to replace the aging Colt Single Action Army revolvers chambered for the rimmed .45 Long Colt.
Meanwhile, a pressing second factor emerged from battlefield experiences during the Philippine-American War (1899-1902) and the Moro Rebellion (1902-1913) in the Philippines. American troops reported poor performance from their smaller .38-caliber revolvers during the campaign.
Frontline reports rolled in, describing harrowing hand-to-hand encounters with enemy fighters who simply shrugged off multiple hits from the U.S. Army’s rimmed .38 Long Colt, which was only recently adopted in 1892. This kicked off a hunt for something new and more powerful.
From the extensive Thompson-La Garde ballistic report in 1904, the army concluded its findings with the following determination: “After mature deliberation, the Board finds that a bullet which will have the shock effect and stopping power at short ranges necessary for a military pistol or revolver should have a caliber not less than 0.45.”
So, the stage was set, and the U.S. Army wanted a .45 caliber projectile similar to the .45 Long Colt already in use with the cavalry. It did not, however, want to return to a slow single-action-only revolver after its intense close-combat experiences in the Philippines.
At the time, Browning and Colt were already working on a .41-caliber prototype cartridge to go with a new semi-automatic pistol design from Browning. They responded to the new request for a .45-caliber cartridge by essentially redeveloping Browning’s handgun design and .41-caliber cartridge. This led to the Colt 1905, which was the first handgun chambered for the new .45 ACP.
Later U.S. Army trials led to the adoption of both Browning’s .45 ACP cartridge and 1911 pistol. Thus, one of the world’s most iconic caliber-gun duos of all time was born. The M1911 chambered for .45 ACP went on to become America’s longest-serving military handgun.
Its military record from 1911 until the mid-1980s made it a household name. But its performance on and off the battlefield made it a legend.
Basic Ballistics & Specs
Like the British .455 Webley, the .45 ACP was a straight-wall design that leaned heavily on the sheer mass of the bullet over velocity to do much of the downrange damage. Unlike the rimmed Webley casing and Browning’s earlier semi-rimmed .32 ACP, the new .45 ACP was a truly rimless cartridge.
Both the straight wall and rimless profile were meant to help the .45 ACP function specifically inside semi-auto firearms that fed from magazines instead of cylinders. At first, the Colt 1905 was tested with 200-grain bullets, but this was increased to 230 grains for what became the standard .45 ACP.
Before we dig into muzzle velocities and other data points, it’s worth highlighting that the U.S. military was very, very interested in terminal performance over simply specs. To that end, the Thompson-La Garde Tests from 1904 took a rather gruesome turn with testing on live animals.
This included a head-to-head comparison of the effects of close-range fire on living cattle with a .45-caliber projectile and a rising star in the 9mm Luger. Here are two brief but graphic excerpts of the results:
Blunt .45 Caliber: “9:46:30 A.M. Animal shot through lungs from left to right; fell to the floor at the sixth shot. Hemorrhage was free from one of the perforations in the right side. The animal was very much excited and kept jumping from side to side until she fell to the floor. Death occurred at 9:49 A.M.”
9mm Luger: “10:15 A.M. Animal was shot from left to right. There was an interval of one minute between the second and third shots, due to a hitch in the working of the pistol.
At 10:18:15 A.M., when the animal had been shot eight times, there was a short interval on account of reloading the magazine. Two shots were fired through the abdomen; at this time the animal was bleeding from the mouth.
After twelve shots had been fired the cow was still standing and had to be killed by the hammer. Ten shots were fired through the lungs and two through the abdomen in this experiment.”
As gruesome as the testing was, the clear impression left on the U.S. military was that the hefty .45 delivered with its heavy weight what the 9mm couldn’t with higher velocities. That terminal performance is still largely represented in the basic ballistics of modern 9mm and .45 ACP ammunition.
Here’s a quick comparison of basic, 124-grain 9mm FMJ and 230-grain .45 ACP FMJ.
You can also compare the .45 ACP stats from above to the rather anemic black-powder 150-grain .38 Long Colt, which offered velocities ranging from 650 to 750 fps. That put it at a mere 140 to 187 foot-pounds of energy. Even the switch to modern smokeless powder only bumped velocities to 750-800 fps. That left it at a relatively low 187-213 foot-pounds of energy.
For the modern shooter, there’s another benefit to the .45 ACP’s slower velocity. The increasing popularity of suppressors benefits from the subsonic speeds generated by the .45 ACP. Normal muzzle velocities for the .45 ACP generally fall between 800 and 900 fps, staying well below the speed of sound (1,125 fps at sea level in 68 degrees Fahrenheit).
Since this slow-flying bullet has enough mass to make up for its velocity, there’s a good reason .45 ACP is a popular suppressor round for handguns and pistol-caliber carbines. This quality was well known to gun designers in the 20th century, with firearms like the integrally suppressed British De Lisle commando carbine using the slow-moving .45 ACP as a quiet sentry killer in World War II.
Pros & Cons
Here are my top five pros and cons for the iconic .45 ACP. Keep in mind that modern specialty loads can vary greatly, so these are only based on the most general characteristics of the cartridge.
Pros:
- Strong terminal ballistics due to heavy weight
- Suppressor-friendly velocities
- Reliable semi-auto design
- Common and easily found caliber
- Over 100 years of proven performance
Cons:
- Large size lowers magazine capacities
- More expensive than 9mm
- Low velocities for longer ranges
- Usually more recoil than calibers like 9mm
- Heavier overall weights for carrying
Final Thoughts
The sheer number of 1911-type firearms still in production, with new variants arriving every year, is a solid testament to just how much America is still in love with Browning’s design. The .45 ACP remains a part of that legacy.
I have no doubt the caliber debate will continue to rage well beyond even the modern era’s “9mm vs. everyone else” trend. As for the classic .45 ACP, I can’t imagine it leaving the American marketplace in my lifetime. Anything is possible, but I think there are too many shooters who love the round for its history and performance to let it just fade away.
In fact, it’s still well-respected for its terminal performance and suppressor-friendly qualities. That has kept it as a go-to option for many law enforcement groups and private citizens. It’s also still a common feature inside Special Operations arsenals, even if its general military use has largely waned.
The “Lord’s caliber” gets the job done.
The Battle of Caloocan was one of the opening engagements of the Philippine–American War, and was fought between an American force under the command of Arthur MacArthur Jr. and Filipino defenders led by Antonio Luna in February 1899.
American troops launched a successful attack on the Filipino-held settlement of Caloocan on February 10, which was part of an offensive planned by MacArthur Jr. Occurring a few days after an American victory near Manila on February 4–5, the engagement once again demonstrated the military superiority that American forces held over the Philippine Revolutionary Army.
However, it was not the decisive strike that MacArthur had hoped for, and the war continued for another three years.
America burned through a quarter-billion dollars in airplanes to save one man. We also salvaged a shot-up Chinook off a murderous Afghan mountainside. If that sounds gloriously unhinged, that is because it absolutely was.
The Brutal Math Behind a $254 Million Rescue
The Lockheed Martin MC-130J Commando II version of the venerable Hercules cargo plane costs about $114.2 million apiece. We burned two of them to cinders in Iran when we couldn’t get their landing gear unstuck after rescuing that downed F15 WSO (Weapon System Operator) on Easter morning of 2026. The details captivated the planet. Somebody will no doubt eventually make an awesome movie about it.
MH6 Little Bird helicopters cost between $2.5 and $7.5 million each, depending upon their combat loadout. These adorable little warplanes are inimitably nimble and versatile. We transported them into an improvised forward airfield inside the C130’s and then used them to effect the actual rescue. However, once the C-130’s were toast, the Little Birds lacked the legs to get back to friendly territory. When it became obvious that these machines were also doomed, the onsite commander opted to blow them in place as well.
In addition to these four perfectly serviceable combat aircraft, we also lost an A10 Warthog to ground fire. Nobody has any idea what a Warthog costs. Their production run wrapped up in 1984. Current estimates are that this gloriously unattractive ground attack plane is worth about $20 million. Additionally, a pair of USAF HH-60W Jolly Green II rescue helicopters got liberally ventilated. They cost $40 million each. However, let’s assume that these two aircraft were repairable.
If my math is correct, we spent some $254 million in airplanes to rescue that one Air Force Colonel. Many of our detractors, particularly in Europe, sneered at us for engaging in such lopsided military economics.
It was clearly ludicrous to spend such an astronomical sum just to save one guy. Speaking solely for myself, screw every last one of them. That operation was worth every penny.
American industry is likely busy building us replacement airframes as I type these very words. I hope those defense executives get to buy themselves lovely new boats. That Air Force Colonel will get to spend the Fourth of July with his family rather than being burned alive in a cage somewhere or paraded around in front of Iranian cameras. A quarter of a billion dollars was a freaking bargain.
Aircraft Losses and Rescue Cost Breakdown
| Aircraft | Cost | Article Context |
|---|---|---|
| MC-130J Commando II | $114.2 million apiece | Two burned after the rescue in Iran |
| MH6 Little Bird | Between $2.5 and $7.5 million each | Used in the rescue, then destroyed in place |
| A10 Thunderbolt II | About $20 million | Lost to ground fire |
| HH-60W Jolly Green II | $40 million each | Two were hit, assumed repairable |
| Total Spent | $254 million | To rescue one Air Force Colonel |
DART Math: Why Recovering Wrecked Aircraft Still Makes Sense
The military term is DART. That stands for Downed Aircraft Recovery Team. These machines are indeed lyrically expensive. It is almost always a good idea to get them back once they are damaged in combat so they can be repaired. However, that is easy to say and often very difficult to do.
During my time in Army Aviation, I took part in three of these operations. In the case of a USAF F15C and a British SEPECAT Jaguar, these two fighter planes were veritably pulverized. We just flew the guys and gear out to tidy up the mess and placate the EPA. However, at one point, one of our CH47D helicopters clipped a tree and shredded a couple of rotor blades deep in the boonies.
Swapping those puppies out in the middle of no place was tough, and we didn’t have anybody shooting at us. Starting on 4 March 2002, the young studs of the Army’s Task Force 160 SOAR (Special Operations Aviation Regiment) had to do something similar under hugely more difficult circumstances.
Takur Gar: Where the CH-47 Chinook Recovery Story Really Begins
The Global War on Terror was only six months old, and the world was trying to find its new level. In Afghanistan, that meant that US Special Operations forces were keeping busy killing absolutely everybody who had anything to do with al Qaeda and their ilk. As SOCOM chased down the squirters from the Battle of Tora Bora, things came to a head on a forlorn mountaintop called Takur Gar.
Takur Gar is a 10,000-foot mountain peak in the Arma Mountains of southwest Afghanistan. If misery was a mineral you mined out of the ground, this is where you would go to find it. The mission was to drive al Qaeda and Taliban fighters into blocking positions manned by elements of the 101st Airborne and 10th Mountain divisions.
Why the CH-47 Chinook Was the Only Beast for the Job
I’m biased, because I flew these things. However, I flew guns, scouts, and lift aircraft as well. The CH47 is hands-down the baddest helicopter in the Army’s inventory. Faster than any other Army rotorcraft, the Chinook is just insanely powerful.
That gives it better high altitude performance than lesser machines. I have actually taken stripped-down Chinooks to around 22,000 feet to fly over the top of Mount McKinley in Alaska. It is an amazing airplane. That made it the go-to aircraft for operations in the rarefied mountains of Afghanistan.
Early in the morning on 4 MAR 2002, MH47E tail number 476 of the TF 160 Night Stalkers was inserting troops onto Takur Gar when it came under intense fire. The aircraft was raked with enemy automatic weapons and actually took more than one RPG round.
Staggering under the onslaught, the big Chinook shuddered, and Petty Officer Neil Roberts, a Navy SEAL, was thrown out of the back. Roberts survived the fall only to be killed later. An attempted recovery resulted in the destruction of another MH47, tail number 475.
475 was disabled at the top of the mountain. There resulted a pitched battle that was explored in the book Not a Good Day to Die, which is a great read. It is available on Amazon. 476, however, limped off to an emergency landing some six clicks away and 2,000 feet below the summit. While a bit removed from the chaos, 476 was nonetheless still deep in the suck.
475 was toast. An American fighter-bomber blew it to smithereens. However, 476 still had potential. It might yet be saved.
How Do You Recover a Shot-Up 54,000-Pound Helicopter?
A fully-loaded MH47E tops out at 54,000 pounds. This example was disabled high up on the side of a desolate mountain surrounded by psychopathic nutjob lunatics. Getting that bird back home promised to be a Gordian challenge.
TF160 maintenance crews and pilots flew to the site and swarmed over the disabled machine, taking off everything they could to cut down on weight. They considered another Chinook as well as a Marine CH53E Sea Stallion to do the heavy lifting, but neither aircraft had the horsepower to lift what remained of the machine. Then somebody tracked down a Soviet-era Mi26 with a Russian civilian crew. That would be expensive, but it could do the job.
They had to leave the aircraft unguarded for a time during this process. To ensure that terrorists had not boobytrapped the machine, the SEALs planted desirable swag like food, water, and warm clothes in the cabin.
They knew that, if someone had been mucking around with the disabled helicopter, they would have kept the food and comfort items. When they found this stuff unmolested, they knew they were good to proceed.
Getting stuff off the aircraft at these high altitudes was not easy. Using a Gator ATV, they eventually recovered one of the Chinook’s two engines. The other was too heavy, and the guys were too smoked to manage. That power plant had to be abandoned. They had to cut the rotor blades off with a rescue saw.
The Wild Recovery: Rangers, Night Stalkers, and a Russian Mi-26
The recovery team emptied the fuel tanks onto the ground. OSHA and the EPA have limited jurisdiction in the desolate mountains of Afghanistan. As US troops came and went from the site, they would be regularly fired upon. After removing both engines, the rotor blades, the refuel probe, the gun mounts, sundry avionics, and as much ancillary gear as possible, they were ready to try it.
The recovery team consisted of four flyable MH47E’s, an F18 Super Hornet, several AH64 Apaches, an orbiting UAV, and a buttload of Rangers for security. Once they had the hulk rigged for slingload, they called in the Mi26.
That was easier said than done. However, one of the 160th troops was a former Russian linguist who could interpret for the Mi26 crew. With the Mi26 stripped down to just fuel, they hooked up to 476 and pulled pitch.
The massive Mi26 made it look easy. The big Russian helicopter lifted the Chinook to Gardez and topped off with gas. From there, they moved to Kabul International Airport and then on to Bagram.
When the maintenance crews finally tore through the airframe, they recovered multiple spent enemy rounds that they distributed to the original crew members. The Hulk was eventually recovered to the US and completely rebuilt. 476 subsequently flew in combat again. Chances are, it is still flying today. That thing seems to be unkillable.
Why Chinook 476 Still Matters
Much was learned from the recovery of tail number 476 from the side of Takur Gar. Not least among these was the development of a lightweight spider crane that could be air deployable and facilitate the removal of heavy stuff like engines and rotor blades. The combat recovery of 476 represented the first successful battlefield salvage of a battle-damaged US Army helicopter since the Vietnam War.
Machines as complicated as the CH47 have their own personalities. Some of the rotor systems are tracked out to run smoothest at high speeds. Others have a sweet spot at slower velocities.
These aircraft not infrequently have electronic quirks that you come to recognize after a little stick time in them. In my day, certain aircraft were wired for a boom box so you could rock out while flying NOE (nap-of-the-earth), while others were not.
In the Army, the crew dogs own the airplanes. We pilots just borrowed them for a while. It was their names stenciled on the outside, not ours. As our flight engineers and crew chiefs flew with us and shouldered all the same risks and responsibilities, this created a fiercely powerful bond between these machines and the guys who kept them flying. In the combat recovery of tail number 476, we see this mystical connection on most glorious display.
Anyone who ever flew an Army helicopter reveres the Loach. Uncle Sam called the bizarre little egg-shaped aircraft the OH-6A Cayuse. Its official classification was Light Observation Helicopter, hence the informal appellation “Loach.” The Loach looks and sounds like a giant, angry bumble bee. It is a simply magnificent machine.
The Loach was used for scouting missions during the Vietnam War. The aircraft was flown without doors at extremely low levels. The typical crew layout was a single pilot on the right with a crew chief sitting just behind on the same side, packing an M60 belt-fed machinegun suspended from a bungee cord. Offsetting the weight on the left was an M-134 minigun in an XM21E1 mount. This electrically-powered 7.62x51mm belt-fed Gatling gun cycled at either 2,000 or 4,000 rounds per minute via a two-stage trigger. It fed from a 2,000-round ammunition magazine. The pilot sighted the minigun via a grease pencil mark on the inside of the Plexiglas canopy.
The Loach operated most commonly as part of a Pink Team. In this configuration, the Loach cruised about down low in the dirt, looking for bad guys, while one or two AH-1G Cobra gunships orbited at altitude, waiting to dive in at the first sign of trouble. The two elements maintained constant radio contact. Experienced Pink Teams were devastating killers on the battlefield. Survival and tactical effectiveness demanded both nerves of steel and exceptional pilotage.
Of all the scout pilots who served in Vietnam, one name percolates above all the rest: Lt. Col. Hugh Mills. He is a legend among Army aviators, even today. A Loach painted as his distinctive “Miss Clawd IV”, dangles proudly from the ceiling at the Army Aviation Museum at Fort Rucker. Among rotary-wing aviators, that is the Army’s highest accolade. Lt. Col. Mills earned every bit of that love.
A Hard Day in Hell
In the summer of 1969, then-Lieutenant High Mills piloted his agile little Loach as the bottom half of a hunter-killer Pink Team. In the back was his regular crew chief, Jim Parker. Mills and Parker had flown together for months and were forged into an exceptionally effective scout team. On this fateful day, they were clearing the route for a supply convoy along a length of highway called Thunder Road.
Without warning, Mills’ Loach was engaged by a well-sited VC .50-caliber machine gun. One of the big thumb-sized rounds punched through the leading edge of one of the Loach’s four rotor blades about four feet from the tip. There resulted a skull-crushing vibration as the hearty Loach clawed to stay in the air.
Mills retained control of the stricken aircraft, but only just. He guided the doomed helicopter to a controlled crash on a nearby flat piece of rice paddy. Parker split his chin on the front sight of his M60, but both aviators were otherwise unhurt. They cleared the aircraft with Parker’s M60 and a seven-foot belt of ammo along with Mills’ CAR-15 and a bandoleer of magazines.
Mills spotted a pair of VC soldiers shooting at them with AK-47s from about 175 yards away. He fired a burst from his CAR-15 as Parker sprayed the area with his M60. Both enemy soldiers fell, but they just kicked over the anthill.
A substantial VC force began slathering the crash site with fire and moving toward the two trapped aviators. Parker returned to the crashed aircraft to retrieve more M60 ammo as Mills covered him with his CAR-15. Meanwhile, the high-cover Snake pummeled the tree line with 2.75″ rockets and minigun fire. However, the Cobra soon ran out of ammo.
Just when it seemed like all was lost, a nearby Infantry Brigade commander in a command-and-control aircraft dropped down to make an emergency extraction. Parker and Mills clambered aboard the hovering Huey and made their escape before the remaining VC could stop them.
Turning an NVA Pot into a Colander
During that same summer, Mills and Parker were tearing along in their Loach on a routine trip into Dau Tieng for a briefing. They had a G-model Cobra flying top cover. As they pitched over a ridgeline, Mills surprised an NVA heavy weapons platoon on the march. Without hesitation, he opened up with his minigun at close range as Parker unlimbered his M60. The NVA troops answered with a fusillade of AK-47 fire.
A pair of NVA soldiers tore off down a paddy dike toward the wood line and cover. The nearer of the two enemy soldiers carried a big cooking pot that flapped against his back as he ran. Mills quickly pivoted his nimble little aircraft, lined up the grease pencil mark on his canopy and triggered a quick squirt from his minigun. His burst passed through the nearest NVA soldier and into his buddy, killing them both.
Mills chased the remaining NVA troops around the paddy until both he and Parker ran out of ammo. Parker then unlimbered both his M16 as well as a 12-gauge pump shotgun. Meanwhile, Mills steadied the collective lever with his knee and emptied six rounds left-handed from his personal .357 Magnum revolver at the fleeing enemy troops. Once completely out of ammunition, Mills rolled clear so the orbiting Snake could pulverize the area with 2.75″ rockets packing flechette warheads.
In two minutes of unfettered combat, their Loach had been hit 25 times. The airspeed indicator and altimeter were both blown away, and the armor plate underneath Parker’s seat had caught two rounds. Mills’ seat armor stopped several more. Five rounds shattered the Plexiglas canopy, two hit the tail boom, and another three struck the rotor blades. One AK round transited the engine compartment but missed anything significant. Another shot the op rod off of Parker’s M60.
Supporting ARP (Aero Rifle Platoon) grunts subsequently inserted and swept the area. They cataloged 26 KIA and seized a pair of POWs along with a large number of AK-47 rifles, an SGM heavy machinegun, a 60mm mortar and a pair of Russian pistols. When they returned to base, the infantry troops presented Lt. Col. Mills with a cooking pot sporting 24 bullet holes.
The Rest of the Story
While serving three combat tours in Vietnam, Lt. Col. Hugh Mills earned three Silver Stars, three Bronze Stars, four Distinguished Flying Crosses, and the Legion of Merit. He was shot down an amazing 16 times and was wounded three times in combat. He ultimately flew 3,300 combat hours in OH-6A and AH-1G helicopters. His record as a combat aviator will never be bested.
The OH-6A was tragically replaced by the Bell OH-58 in Army service. Both aircraft shared a common engine, but in my opinion the Loach was a massively better aircraft. I flew OH-58’s myself, and we all mourned the passing of the Loach. However, that was not the last Uncle Sam saw of this extraordinary little machine.
The Task Force 160 SOAR (Special Operations Aviation Regiment), better known as the Night Stalkers, adopted the OH-6 in an upgraded form as the MH-6 Little Bird. They call it the “Killer Egg.” These immensely capable machines feature an upgraded powertrain along with a more efficient five-bladed rotor system. The Night Stalkers use both an armed gunship version of the aircraft as well as slick-sided variant designed for covert insertion of special operators in places where stealth and speed are of the essence. If ever I win the lottery, my first call will be to my wife. My second will be to Boeing to pick up an MH-6 of my own.
Lt. Col. Mills penned a book about his exploits in Vietnam titled Low Level Hell. It is an amazing read that is just packed with action along with plenty of cool commentary about small arms. It is available on Amazon.