fossilesque@mander.xyzM to Science Memes@mander.xyzEnglish · 10 days agoBurning Upmander.xyzimagemessage-square485fedilinkarrow-up11.29Karrow-down1109
arrow-up11.19Karrow-down1imageBurning Upmander.xyzfossilesque@mander.xyzM to Science Memes@mander.xyzEnglish · 10 days agomessage-square485fedilink
minus-squareborari@lemmy.dbzer0.comlinkfedilinkEnglisharrow-up28arrow-down3·10 days agoWe’re more familiar with 5.56x45mm thanks to all our school shootings thank you very much.
minus-squarealcoholicorn@lemmy.mllinkfedilinkEnglisharrow-up7arrow-down1·10 days agoIn the same way a US ton and a metric ton is like 10% different, a 556 bullet is actually 5.7 mm across.
minus-square Morphit @feddit.uklinkfedilinkEnglisharrow-up11·10 days agoBecause the minor diameter of the barrel is 5.56 mm and the major diameter is 5.69 mm. If the bullet were smaller than that then the propellant would blow past it. They didn’t make a 'murican millimetre like they did with the imperial system.
9mm
We’re more familiar with 5.56x45mm thanks to all our school shootings thank you very much.
In the same way a US ton and a metric ton is like 10% different, a 556 bullet is actually 5.7 mm across.
Because the minor diameter of the barrel is 5.56 mm and the major diameter is 5.69 mm. If the bullet were smaller than that then the propellant would blow past it. They didn’t make a 'murican millimetre like they did with the imperial system.