Many types of bulkloaders can scratch the film if there are small
grains in their felt. If this happens, then the whole lot of 19 films
or so get the scratches. The Alden and Watson bulkloaders
don't have this problem, but they waste a lot of film also at
the end. I don't know if there are others which are safe in
this sense, too. I started to bulkload without bulkloader.
The only thing you need is an absolutely dark room. With
a little bit of practice, you can load a 100 ft reel onto 19
cartridges in half an hour.