Well, after reviewing the subject of Dacron filler for 45/70 on this and other forums I decided to invest in the purchase of a modest quantity via the bay in order to try it out. I Picked a reasonably priced (i.e. cheap) supply and paid. It has now been delivered and examined with interest. After separating what looked like the right amount to stuff in front of a light load of powder, and comparing it with what was sent, I now conclude I have a sufficient quantity of Dacron to supply the entire Union Army for a month!