Most of us know what two liters of carbonated sugar water looks like.
this post was submitted on 06 Jun 2025
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Hey, that's flavored carbonated sugar water if you don't mind.
Ignore all the rest of the US rounds like .30-06, .30-30, .357, etc.
And let's not get started on .338 lapua magnum.
A bastard child of both American and British measurements, ending up being made by a metric manufacturer.
Every US company I’ve (engineer) worked for has been a metric company
I (machinist) have only seen a few large US firms or companies send me a metric print. Different worlds, I guess.
As an engineer who dabbles in machining, that checks out. What really grinds my gears (sometimes literally) is how sometimes people use fractions of an inch and sometimes people use decimals.
That is usually related to tolerances, though. Like 0.1250 is interpreted much differently than 1/8".
.223: Proper American rifle round.
5.56: Communist European rifle round.
5.56 puts out slightly higher pressures. I used to have a bolt action .223 rifle that wasn't rated for 5.56. I sold it to an old guy in the country who was going to use it to kill coyotes stalking his chickens and small livestock.
I was gonna say similar, minus the coyote shooting. Well, kinda.
And by "Americans" you mean the companies that manufacture the firearms, right? Or whatever body, if any, that controls what size ammunition cartridges are measured by?
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cops: "9mm is too weak! we need something with 'stopping power!"
gun people: "ok here's 10mm"
cops: "too much recoil!"
gun people: "ok here's .40 s&w"
cops: "u no wat, we're just gonna stick with 9mm"
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We all use metric. We need to just rip the bandaid off.
and drugs
Took me a while to realize that Caliber is roughly inch/100. Once I did I no longer needed to memorize them.
I don’t understand. A 5.56mm round has a .223 bullet. .223 is the caliber and is in inches already, no math required. .223 / 100 =0.00223 which isn’t particularly useful.
Their math was flawed, but I'm not really sure how to explain the math part better. I get what they were going for, though.
It's closer to decimal divisions of an inch, so a .223 caliber bullet would be a hair shy of a quarter of an inch (.25) wide.
Edit: just realized you had the second part of that already
That still makes no sense. Is the commenter surprised to learn that a 0.223 inch caliber is approximately 0.223 inches? That a .45 inch caliber is about .45 inches? Yes, that's how units work.
But you don't call it "point four five caliber" you call it "forty five caliber". Similar is 7.62 mm AKA "thirty caliber". It's reasonable that someone wouldn't know that it's literally just hundredths of inches.
Shotgun gauge is wonky, so it's not a given that the number would just be a diameter in units they are familiar with. "Grains" are also a meaningless unit to most people.
What do you mean? its 7000 grains in a pound. 27ish grains to a dram, 16 drams to an ounce, and 16 ounces to a pound. Pretty straight forward.
Also dont confuse an ounce(oz) and a fluid ounce(fl oz). That's 8 fluid drams to a fl oz, 16 fl oz to a pint, 2 pints to a quart, and 4 quarts to a fucking gallon cause it makes sense. Obviously, 63 gallons to the hogshead.
Shotgun gauge is wonky, so it's not a given that the number would just be a diameter in units they are familiar with.
Yeah, it's not intuitive that bigger gauge numbers = narrower diameter unless you've specifically worked with wire or shotguns before.
caliber
dodge caliber
.233 bullet
bullet is ~1/4 the size of a compact vehicle
us military: ERECT
Also wetsuits…? 🤷♀️
Hey, that's a win. I'll take it.
Well you know, first things first.
9mm Parabellum was designed by Austrian George Luger 10mm Auto was designed by FFV Norma AB of Sweden 5.56 NATO was developed in Belgium by FN Herstal, as was 5.7mm 7.62×39mm was developed by the Soviets
These European cartridges all use metric measurements
.223 Remington, .308 Winchester, .30-06 Springfield, .40 Smith & Wesson, .22lr, .357 Smith & Wesson Magnum, .44 Remington Magnum are all American made cartridges that use decimals of Imperial measurements Original designer’s name gets includes because, well, capitalism lol
I think one of the few exceptions might be 6.5mm Creedmoor, developed by Hornady
It's like that because everyone else measures them that way, and capitalism. It's not even because it's a better system, it's because money.