Which preposition to use with rammers

in Occurrences 1%

The Paviour halts in mid-gruntstands With rammer in his idle hands; And quite refined, and at his ease, Forgetting onions, bread, and cheese, The hungry Drayman leaves his lunch, To take a peep at Mister Punch.

of Occurrences 1%

The Greek artillery-men shot away the rammer of their only field-piece, after a few discharges, rendering the gun useless.

Which preposition to use with  rammers