At least in Washington state (988 Suicide & Crisis Lifeline) that’s not what that hotline is for - that’s for people with suicidal urges to find someone to talk to, absolutely not the hotline for ‘someone just shot himself and we need medical assistance immediately’.
Like yeah, it sure sucks that the phone number for ‘I need an ambulance’ is the same one for ‘I’d like to be shot dead in my home’, but that doesn’t make a suicide hotline somehow the right one, and calling them very well might not produce the result you want, because at best they’re likely to just contact 911 for you and adding a step of separation and delay is unlikely to help anything.
