To reply to Shminux, I imagine it’s because the sense of doom is some magical warning of the repercussions of Harry and Voldemort’s magic colliding, which probably is not being set off by the probability of Harry’s life being ended by a high-velocity piece of metal fired from a completely non-magical weapon.
To Alsadius, I think the gun is more deadly to Harry than an Avada Kedavra because of Harry’s previous resistance to the spell. Remember when Quirrell previously suggested that they stage a “return of Voldemort scenario” where the pretend-Voldemort shot another killing curse at Harry who would block it with his Patronus 2.0? Harry’s reaction was something along the lines of, “Nobody would believe that Voldemort would be so stupid to try that again.” Apparently, Harry’s ability to block it (as demonstrated in Azkaban) and previous resistance (as demonstrated the night his parents died) made Voldemort think the same thing.
More generally, a gun can be used to disable Harry in all sorts of not-necessarily-fatal ways,
And that’s apparently his intent, since it’s “pointed at Harry’s wand arm”. He’s not threatening to kill Harry, but only preventing him from using his wand to do anything.
What on earth makes you think that a gun is more deadly than Avada Kedavra in Voldemort’s hands?
To reply to Shminux, I imagine it’s because the sense of doom is some magical warning of the repercussions of Harry and Voldemort’s magic colliding, which probably is not being set off by the probability of Harry’s life being ended by a high-velocity piece of metal fired from a completely non-magical weapon.
To Alsadius, I think the gun is more deadly to Harry than an Avada Kedavra because of Harry’s previous resistance to the spell. Remember when Quirrell previously suggested that they stage a “return of Voldemort scenario” where the pretend-Voldemort shot another killing curse at Harry who would block it with his Patronus 2.0? Harry’s reaction was something along the lines of, “Nobody would believe that Voldemort would be so stupid to try that again.” Apparently, Harry’s ability to block it (as demonstrated in Azkaban) and previous resistance (as demonstrated the night his parents died) made Voldemort think the same thing.
More generally, a gun can be used to disable Harry in all sorts of not-necessarily-fatal ways, something Voldemort cannot do using magic.
With that said, Voldemort is also surrounded by the bodies of Harry’s unconscious friends, so it’s not like he urgently needs extra leverage.
And that’s apparently his intent, since it’s “pointed at Harry’s wand arm”. He’s not threatening to kill Harry, but only preventing him from using his wand to do anything.
Remember what happened the last two times Voldemort cast Avada Kedavra near Harry?