This is some wonderful ammo. Supposedly made on GI machinery but I still think that's an unconfirmed "rumor". This was available in 480 round crates (shown below) or in 720 round crates. The ammo is Boxer primed and non-corrosive.
WW2 style crate with two "spam" cans inside.
Opened can of ammo.
Inside the can were eight bandoleers of 60 rounds each packed on '03 chargers with cardboards. This is what they looked like.
Olympic Brand ammo has also made an appearance in the US. Initial reports are poor QC and inconsistant accuracy. This ammo is made by a commercial company for the US market. It is Berdan primed and non-corrosive.