A demonstration is given by historical re-enactors at the <a href="https://en.wikipedia.org/wiki/Springfield_Armory" class="extiw" title="w:Springfield Armory">Springfield Armory</a> of <a href="https://en.wikipedia.org/wiki/Field_artillery_in_the_American_Civil_War" class="extiw" title="w:Field artillery in the American Civil War">civil war era field artillery</a>.
National Park Service
[www.nps.gov National Parks Service]