This is because the bullets are used one time, and the case lasts for many reloadings.
To bring it to their converters necessitated a long voyage by water and rail, with several reloadings.
Cited from The Age of Big Business, Burton J. Hendrick
Done this way, TCU sized brass generally becomes as reliable for multiple reloadings as any other handgun cartridge case.
Root form of reloadings
for the verb.
Place a new load on
The movers reloaded the truck