It’s a pretty heavy mix, many of the most popular rounds are referenced by their metric size but they’re not usually ‘useful’ sizes in either standard or metric.
For example:
- .22 LR = .223in = 5.56 NATO
- 9mm = .357 mag
- .40 S&W = 10mm Auto
- .308 = 7.62mm
- .44 = no common metric eq.
- .45 = no common metric eq.
- .50 = 12.7mm
CybranM@feddit.nu 5 days ago
So the most American things in America are using the least American measurement system?
adarza@lemmy.ca 5 days ago
some of the popular ones are measured in metric, but there’s plenty that are not.
en.wikipedia.org/wiki/Caliber#Metric_and_US_custo…