I got a bunch of the green corroded boxer, chucked it in my drill and spun it in steel wool to clean the worst ones off.
I shoot it through my M305 with mediocre results. Compared to my handloads it's shotgun ammo lol.
Runout is bad, probably why the accuracy is iffy. I reload the brass and use it for target loads in bolt guns, once prepped it's very good. Brass is not NATO spec, it's pretty soft and thin, very similar weight/capacity to Winchester 308 brass.