Easily a couple of dozen rolls worth of film. Ye Olde Photographer doesn't
own a bulk loader, but in his youth dealt with this by taping the film end
to the cassette spool, hanging the spool on a nail and unrolling down to a
another nail or marker. One allows 1.5 inches per frame and adds about six
or seven for leaders, The film is rolled up on to the spool, then the spool
is inserted into the cassette with the film directed out through the felt-lined
slot and the end cap put on. All this is done in total darkness of course!