the report said nothing about the ammo or where he shot himself. it is useless for the subject you brought up.
i like bird shot for its dense load up close and mitigated power after it starts encountering objects.
birdshot has its place. we used to skip in bird shot or shoot the legs of rioting inmates over 25 yards because used in this way it is considered less lethal.
it is up to the owner to use want they want then know the limitations of those tools.
there is a lead powder shot that is extremely dense and is even better than bird shot in its loosing energy at distance.
only you can know what you feel comfortable with.