Place front of pistol on a solid piece of wood, with barrel clear of the wood. Give the grip a good hard rap / pushing forward. That should move the slide ejecting round in chamber.
DO NOT........... put the front sight against the hard surface. Unless you don't mind it being broken and or torn off.



This is one of many on utube, only this guy does it w'out using something to rest the front of slide against . Try this way 1st then go from there. About the.30 sec mark.
https://www.youtube.com/watch?v=K3rcaiUsTqI