A worm works to retrieve a lost patch or swabbing material. It can pull cards and wads from a smoothbores charge too.
The amount of tow (flax fiber) on yours looks like it was being used to swab/wipe.
Another use for tow was it could be charred , then used for fire starting.
It's usefulness made it worth having some. Even used/dirty as it could likely be washed and reused.
Interesting mix. I can't tell size well from the pics.
Is the worms rough diameter including the wad of tow much larger than the cast roundballs?
The charger to measure powder can be figured out as to what volume it tossed. That could help IF related to the ball size. Meaning not from another gun.
Then , the dowel hints of a pistol ramrod substitute.
Some cloth for cutting patches. The right material makes for better patches. Material,tightness of weave ,thickness,strength..That meant the tow could be used for wiping the barrel , and not using the better patch material. That is , if the cloth in your shooting bag was just right for the load the user found best.
I'm not familiar with the molds design. Interesting . Almost (though a crude comparison) like a sizer for a finger ring to reduce it.
Neat old shooting bag.
The stories it could tell....