M1 ammo was also packed "in bulk".
These came with no bandoleers, all the ammo was packed in clips with cardboard bullet protectors, tightly packed in an ammo can the same size as the bandoleer packs.
The center top clip had tape on it to use as a handle to pull the first clip out.
I seem to remember there were 262 rounds??? per can in clips.
This may have been after the war. The cans I got from the DCM were post-Korean War issue by Lake City. I "think" it was LC-1972.