10 Rounders,

Just like Maryland.  The Florida murderer just restricted himself to small magazines, rather than being forced to by the state as here.

"[mass murderer] went in with only 10-round magazines because larger clips would not fit in his duffle bag, Book said."

The same article said he had 150 unfired rounds.  So his duffle bag could hold fifteen 10-round mags, but no 30-rounders?  I'm confused as to how that can be, and want more details.  It makes no sense.  What sort of weird duffle bag is this?