Without being enclosed in a chamber to allow pressure ,most ammo is not a big threat.
(Of course , compression with a weighted object or with one causing pressure to be trapped pressure is allowed...)
To dispose of a round I carefully (avoiding primer or being near an ignition source) work the bullet loose with a left/right leverage with bullet secured.. Then dump the powder in a place it won't be ignited.
A bullet puller would be better if a lot of rounds were involved.
Yes the primer is a type of charge. But other than fire hazard or someones eyes if close ,I'm not as worried about the primer. A soak in water can sour one ,though some military and others are sealed on the outside.