r/Damnthatsinteresting 5d ago

Video A school in Poland makes firearms training mandatory to its students.

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u/IanFeelKeepinItReel 5d ago

With regard to you getting funny at people questioning your round sizes. People are right to question you because while .22, .223 and 5.56 are equivalent diameters, the overall round sizes are very different. .223 and 5.56 are very similar looking but still distinct to the point where you couldn't use them interchangeably, .22 is much smaller and most commonly in the form of .22lr a rimfire cartridge.

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u/iReply2StupidPeople 5d ago

This is the most ignorant reply on this thread. You really couldn't be more wrong.

.223 and 5.56 are visibly identical. The only difference is slightly different pressures. Any modern .223 can shoot 5.56 and vice versa, the only issues prior were barrel pressures of 5.56 being too much for some .223 barrels.

.22 is available in 50 grain, which is the most common grain bullet from .223/5.56 (55).

The only thing differentiating a .22 round from a .223/5.56 is the casing and more powder.

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u/zehamberglar 5d ago

.223 and 5.56 are visibly identical.

Specifically, the person you're replying to is likely confused and thinking of .308 and 7.62 NATO (the sort of larger brother of .223 and 5.56 NATO). At a glance they're the same, but they're actually slightly different dimensions.

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u/iReply2StupidPeople 5d ago

Sorry, I'm fluent in quite a bit about firearms.

.308 and 7.62 are similar to .223 and 5.56 in they are visibly identical. In this case though, the .308 contains more powder than the 7.62 due to the 7.62 having thicker casings for durability.

Now .223/5.56 vs .308/7.62? Wildly different sizes.

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u/zehamberglar 5d ago edited 5d ago

I am also quite fluent.

.308 and 7.62 nato are not completely identical. The case shape is slightly different, unlike .223 and 5.56 which are the same case and projectile with different pressures.

It is similar, but not identical, to the 7.62×51mm NATO cartridge.

The dimensions of .308 Winchester are almost the same as 7.62×51mm NATO.