this post was submitted on 01 Apr 2024
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as a non gun person, how much are we betting that we use metric sizing, and the load them based on imperial standards (for the ammo manufacturers that work in the US)
(It's just a way to brand....a 5.56 bullet is a .223 bullet but a 5.56 cartridge is much "hotter" then a .223, you can fire a .223 through a 5.56 rifle but I would strongly recommend not doing 5.56 in a .223)
And a .308 is a 7.62mm NATO. You can fire a 7.62 through a 308, but you shouldn't fire a .308 round through a 7.62 NATO gun because of a slightly different shell shape and higher pressure loads.
This isn't true. Both 5.56 and .223 can be loaded to a variety of pressure specs. 5.56 being hotter is fudd lore due to it being the military spec.
The difference between the two comes down to how the neck of the cartridge is measured. The the 5.56 is rated to withstand a certain pressure...it does not mean it is always loaded to a higher pressure.
The reason you don't want to shoot 5.56 in a .223 is because the cartridge neck doesn't fit the chamber properly and the resulting incorrect headspace is what can cause a catastrophic failure ..again it's not due to the round being hotter.
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.500S&W and .50 Browning would like a word.....
12.7×41mmSR and 12.7×99mm NATO have no words.
Those are mere translations for those that lack Freedom Units(tm). And not how the inventors intended them to known as. (Blessed be John Moses Browning and in His name we shoot)
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This is a pretty good video explaining why the imperial system in the U.S. isn't as bad as it seems: https://youtu.be/iJymKowx8cY?si=wcyG7yM150e71Rn4
Just because it isn't as bad a joke would imply doesn't mean it still isn't really quite bad
Base 12 vs base 10 is pretty much the only objective advantage of USC, and it only uniquely occurs in USC for small construction-scale tasks (i.e. the inch-to-foot scale).
I don't think people critiquing USC are unaware of what this video is saying. We just think it's still worse.
source: 8th gen American who would rather switch to SI
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The United States has been on the Metric system since the late 1800s like every other Western country.
In what useful sense?
Every food label, with very few exceptions, lists the contents in either grams or milliliters, in addition to ounces or fluid ounces. Every thermometer I've ever seen has both Fahrenheit and Celsius scales. We buy electricity in watts with metric currency. We measure the light output in lumens, and the common lightbulb sizes are measured in millimeters, but the wires that carry the electricity are measured by AWG. The parts on my bicycle and car all use metric measurements, except for tires. Tires are an unholy abomination with section width given in millimeters, the cross-section in a unitless ratio, and the rim diameter given in inches.
Meh, what're you gonna do? We switched to, or adopted, SI and metric where it made sense, but we have a lot of legacy systems.
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let me just pop my 10 mg pills.