Swage Tool

[Dan18]

I have a Swage tool that came with a 45 caliber slug gun...I can't figure out how to easily get the lead slug our of the tool...if a even tap the plunger with a small amount of pressure the slug won't leave the tool... when I push on the rod by the nose of the slug...what maintenance should I do to the tool ...it appears clean I have oiled it to aid in dropping out the slug still NG