The shooting world is drowning in half-truths, superstition, and hand-me-down “wisdom.” Some of it started as a kernel of fact decades ago and then fossilized. Some of it is pure guesswork repeated often enough to feel true. Either way, bad information isn’t harmless. It wrecks guns, wastes money, and convinces good people to make dangerous choices. When you’re dealing with pressure vessels that detonate inches from your face, “close enough” isn’t close enough. Specifics matter. Materials, geometry, velocity, and fouling all matter. If the advice you’re hearing can’t name those specifics, it’s lore – not knowledge.
Every Gun Is An Individual
Even firearms built on the same line, the same day, can behave differently. Minute variances in chamber finish, throat length, bore diameter, and surface roughness change how a given bullet seals, how pressure rises, and how residue accumulates. That’s why one pistol will love a load another merely tolerates. Treating models like monoliths (“All X guns hate Y ammo”) leads to bad decisions. The smarter approach is to test, measure, and observe your specific gun with your specific load, then record the results. Stop generalizing. Start documenting.
The Big Glock–And Lead–Myth
One of the loudest myths insists that “Glocks can’t shoot cast,” usually waved around as a blanket warning about polygonal rifling. Here’s the truth: Glock’s original caution was about pure lead bullets, not properly made hardcast bullets. There’s a world of difference between the two. The myth persists because people collapse everything gray and unjacketed into one category. That sloppy thinking causes real problems – chief among them, catastrophic fouling and dangerous over-pressure events when shooters mix ammunition types without cleaning.
Lead Isn’t Hardcast (And Why That Matters)
Pure lead is soft. On the Brinell scale, it lives around BHN 4–5. Hardcast bullets are an alloy (typically lead with antimony/tin) that lands in the BHN 12–25 neighborhood – three to five times harder. Different animals. A correctly alloyed, correctly sized, correctly lubed hardcast bullet interacts with a barrel very differently than soft, swaged lead. Pure lead tends to smear and plate the bore; hardcast obturates just enough to seal, then rides the rifling. If your mental model lumps them together because they’re both “gray,” you’re setting yourself – and your barrel – up for trouble.
Why Polygonal Rifling Got The Blame
Yes, early polygonal barrels and soft lead were a miserable combination. But here’s the key: pure lead will badly foul any rifling, polygonal or traditional. Polygonal grooves can accelerate the mess, but the root problem is the bullet, not the hexagon. As lead fouling thickens, the effective bore diameter shrinks. Keep shooting and your bullets start to yaw (hello, keyholes). Keep shooting after that and pressures spike because you’re forcing a jacketed or hard bullet through a constricted pipe. That’s where cracked barrels and blown primers happen – not because the gun “can’t shoot cast,” but because it was fed soft lead and never cleaned.
The Hidden Danger Of Cheap “Practice” Ammo
Bargain bins are full of pure-lead reloads and swaged bullets targeted at low-recoil plinking. They make noise. They punch paper. They also lay down a stubborn layer of lead. The real risk appears when the shooter then loads a hot jacketed or hardcast round on top of that fouling. Suddenly the gun that’s “always been fine” starts popping primers or worse. The shooter blames the new ammo. The autopsy blames the clogged bore. If you insist on soft lead for practice, clean the barrel thoroughly before switching to anything harder or hotter. Otherwise you’re rolling dice with pressure.
The “Cast Bullets Don’t Work In Glocks” Canard
Plenty of stock barrels run hardcast beautifully – when the bullet is actually hardcast, sized right for the bore, properly lubed or coated, and launched at sane velocities. The moment a YouTuber experiences keyholing with a soft, poorly made “cast” bullet, the internet decides the platform is the problem. That’s lazy diagnostics. Load construction, alloy hardness, bullet fit (.001–.002 over groove diameter is a good starting point), lube chemistry, and bore condition all have to be right. When they are, accuracy and cleanliness follow – even in polygonal tubes.
What “Proper” Hardcast Really Means
Good hardcast bullets aren’t just “hard.” They’re consistent: alloy blended for repeatable BHN; sized to fit your actual bore; flat bases that aren’t gas-cutting; lube (or modern coating) that survives the trip down the tube; and meplats that do work on target. If your results with “cast” are ugly, check these five variables before you indict the barrel. Also, chrono the load. Many “mystery cast” issues are velocity problems in disguise – too slow to stabilize long bullets, too fast for the alloy, or too much crimp swelling the shank.
Coated Bullets: Not All Coatings Are Created Equal
A good coating can reduce smoke and leading. A bad coating becomes grit. If it shears in the rifling, you now have two fouling layers: a coating and exposed soft lead, baking into the steel. Shooters then blame the next jacketed load for “overpressure.” Reality: the bore turned into a constrictor. If you shoot coated bullets, choose reputable makers, verify hardness and diameter, and borescope your barrel after a couple magazines. If you see ribbons or flakes of coating, change bullets or clean more often. Coating is not a substitute for correct alloy, sizing, and load development.
Revolver Traditions, Modern Problems
Legacy revolver rounds – .38 Special, .44 Special, .45 Colt, .45-70, .32 S&W Long – were born in the soft-lead, black-powder era. That heritage explains why loads still exist that use pure lead: they’re cheap and historically “worked.” But we’re not living in 1895. Cylinders are tighter, pressures higher, and shooters often step up to jacketed hunting loads after an afternoon of lead. Same physics: lead plate the bore, then light the spicy stuff, and you’ll see pressure signs fast. Revolvers aren’t immune because they don’t have feed ramps. Clean the forcing cone and bore religiously if you swap bullet types.
Clean Before You Switch Ammo Types
Here’s a rule that will save you money and maybe a gun: whenever you change from soft lead/coated to jacketed or hardcast, clean to bare steel first. Not “one pass with a snake.” Bare. Steel. Solvent that attacks lead, a tight bronze brush, patches until white, then a dry patch. If you don’t have a borescope, use tight oiled patches and feel for drag – any roughness means keep going. It’s boring. It’s also cheaper than a new barrel.
Stop Generalizing; Start Measuring
If you want repeatable results, adopt a repeatable process. Measure your bore (pin gauges or slugging). Mic your bullets. Record BHN if the maker provides it. Chronograph your loads. Note ambient temperature. Log groups, malfunctions, and leading after specific round counts. If something goes sideways, you can diagnose instead of guess. The difference between a myth and a method is data.
Practical Range Rules That Age Well
A few simple habits pay off forever. (1) Match task to bullet: hardcast for penetration, quality JHPs for defense, soft lead only for gentle, low-pressure target work. (2) Don’t climb power ladders on top of fouled bores. Clean first. (3) Verify function in your gun – don’t assume a model’s reputation applies to your sample. (4) Be wary of bargain reloads with unknown alloys. (5) If accuracy suddenly falls off or holes turn oblong, stop and inspect; that’s your barrel asking for help.
Education Without More Regulation
We test drivers before we hand them keys, yet we expect new shooters to divine complex interior ballistics from memes. I’m not arguing for another layer of rules; I’m arguing for a culture of curiosity. Take a class. Read load data from primary sources. Ask “why” until you can explain it to a friend without hand-waving. Hold yourself – and the advice you pass on – to a higher standard than “some guy online said.”
Final Shot: Accuracy Beats Echo
Myths spread because they’re simple. Reality is messier: alloys, Brinell numbers, rifling styles, coatings, pressure curves. If you care about safety, performance, and the long-term health of this community, choose reality anyway. Treat guns as individuals. Treat ammo as a system. Clean before you switch. Measure instead of guess. And the next time someone declares, “You can’t shoot cast in that,” smile, show them the data, and help retire one more bad idea.
Growing up in the Pacific Northwest, John developed a love for the great outdoors early on. With years of experience as a wilderness guide, he’s navigated rugged terrains and unpredictable weather patterns. John is also an avid hunter and fisherman who believes in sustainable living. His focus on practical survival skills, from building shelters to purifying water, reflects his passion for preparedness. When he’s not out in the wild, you can find him sharing his knowledge through writing, hoping to inspire others to embrace self-reliance.
