Fuji bulk slide film comes on those metal spools and in fact there are issues with using them in bulk loaders. I know with the Lloyd's loaders, the ribs on the inside of the removable side panel can rub against the spool. I just don't cinch down the big red knob *quite* all the way, but others have taken to grinding down the ribs a bit. But they do work OK.
Originally Posted by AgX