So me and Marine Lee are looking over a case of 5.45x39 ammo and on the base it is marked plain as day "270."
We miked all the measurements and it is without doubt a 5.45X39.
5.45×39mm
https://en.wikipedia.org/wiki/5.45%C3%9739mm
Does anyone know or if you have a round can you please look at yours and see if it is thus marked 270??
Thank you in advance.