Yes like executioner headshots... yeah soon enough like in 2025
Actually those were the easiest for me.
Before I discovered the magic that is the one shot headshot of hardcore, I did all of the Executioner ones in core. All you have to do is aim at the head then jump and dump. Since it is a spread weapon (it fire a shotgun shell), if even one pellet hits the head it is an automatic headshot.
Trying to get the other pistol shots to register as headshots were more aggravating thanks to the lag and terrible hit detection.
Once you get used to the range of the Executioner, it isn't too hard to get through the challenges and I have come to actually like the weapon. It's still a niche weapon and compared to pretty much everything else in the game it is complete garbage but I like it.
"Cover your receptors Perceptor." Driver picks the music. Shotgun shuts his cakehole.