rammer
Definitions
A tool or implement used for ramming, packing, or tamping down material.
A person who rams or packs something.
A rod used to push the charge into the muzzle of a muzzle-loading firearm.
Examples
The construction worker used a heavy rammer to compact the soil before laying the foundation.
In the days of muzzle-loading muskets, the soldier used a rammer to push the gunpowder and ball down the barrel.