[yourduskquibble]

100 round barrels?

[nickynickell]

I'd wager they meant drum. Though superimposed loads are a thing too.

[NikkiA]

And given that drum and barrel (when referring to containers) are usually synonyms in English, it's not unreasonable to imagine a non-english speaker confusing the two, remembering that 'barrel' is a term related to guns, and saying '100 round barrel'.

[coldtea]

Yes, 20 round barrels can just kill like 5-6 people, 10-12 if you're lucky and it's a dense crowd, so they're ok /s