Rammer

Now use your rammer to pack it tightly into the barrel.

A "mooner," fond of staring into shop windows, or watching the labourers pulling up the pavement to inspect the gas-pipes, or listening stolidly to the dull "pech" of the paviour's rammer on the flags.

[…] I put my waterproof over the muzzle of one gun, and made a sort of wigwam with two or three rammers that I found, and lay along the tail of another gun […]

The great guns ranged along the deck — each bound fast by its new breechings — with their linstocks and sponges and ladles and rammers, made no idle show of warlike strength.

the Zeppelin Rammer

The loader […] placed the cartridge in the muzzle and shoved it in as far as he could. The rammer rammed it home, the gun captain inserting his priming wire to make sure.