For such a tiny slug of pure lead, most any bench press would be more than sufficient.
Use of an existing slug for swaging would of course be easiest.

There is a .25 cal. non-lead pellet that weighs 16.54 gr. These are soft enough to shoot in air rifles, so must be also soft enough for swaging - maybe, maybe not, however, they might work as-is.

https://predatorpellets.com/product/gto-lead-free-25-caliber/