Quick Google results showed me between 15 and 20% lethality for single GSWs
That needs an addendum, otherwise it sounds like any GSW is about as lethal as covid19:
Not accounting for suicides and precision shooting, a single GSW is likely an accident, which drives the lethality down considerably. Filter out unintentional single GSWs and I bet the lethality is rather different.
This article indicates there’s no difference, in fact, and is lower than the conservative percentage I was getting earlier.
Maybe I’m reading the abstract wrong, but it appears that the article specifically compares single headshots with multiple GSW including a single head GSW. In which case there’s no significant difference.
But maybe I’m reading it wrong. I may be biased, because I really want to believe that JimBob shooting himself in the foot cleaning his gun, occurs with a higher frequency and with less mortality, than people shooting to kill.