Pouring the rest of the black powder and musket ball down the barrel. The cartridge paper itself was also put into the barrel as it helped to keep the charge compact and secure in the barrel. The charge still needs to be seated at the back of the barrel.
Palo Alto Battlefield National Historical Park, Texas, US NPS
<a rel="nofollow" class="external text" href="https://www.nps.gov/paal/planyourvisit/upload/Musket-drill-copy.pdf">Musket drill copy, U.S. National Park Service Official Web-site</a>