$musket->insert( $powder );
    $musket->insert( $ball );
    $musket->tamp();
    $musket->replace_cap( $cap )
        if  $musket->get_cap()->is_expended();
    $musket->aim( $target );
    $musket->pull_trigger();
# vs
    $pistol->shoot( $target );
    $pistol->shoot( $target );