fossilesque@mander.xyzM to Science Memes@mander.xyzEnglish · 2 months agoBurning Upmander.xyzimagemessage-square383fedilinkarrow-up1258arrow-down127
arrow-up1231arrow-down1imageBurning Upmander.xyzfossilesque@mander.xyzM to Science Memes@mander.xyzEnglish · 2 months agomessage-square383fedilink
minus-squareborari@lemmy.dbzer0.comlinkfedilinkEnglisharrow-up4arrow-down1·2 months agoWe’re more familiar with 5.56x45mm thanks to all our school shootings thank you very much.
minus-squarealcoholicorn@lemmy.mllinkfedilinkEnglisharrow-up1·2 months 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-up1·2 months 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.