Non lethal method
Mosin Nagant takes 3 shots per phase to take Volgin down.
Lethal method
by Metsa
Note: with this method, you do have enough time to shoot both the Kerotan and GAKO at the end of the fight during Volgin's death animation
by SuaveBeardson
Mosin Nagant takes a lot of ammo, but is quite fast if applied right.
Remember there's an ammo box right at the start of the hangar when you box teleport in.
Most Optimized Non-Lethal Volgin 1 by Tromboncino
Not much to say here except:
NOTES:
https://www.youtube.com/watch?v=MfiyonzlCzs
found initially by Bradderfield, performend and recorded by Pythonicus
https://www.youtube.com/watch?v=MF11E5-pDzg
by Pythonicus
https://www.youtube.com/watch?v=tHo2VNtHUGo
https://www.twitch.tv/metsametsa/clip/CoweringBrainyToothAMPEnergy-azEsqS_b4ybMEubC
by Metsa
https://www.youtube.com/watch?v=s219Qk055qw
by Setharooni_
https://www.youtube.com/watch?v=1qlUw4nP1PE
by BigBoss
https://www.youtube.com/watch?v=T_ypKYP9bTc
by LilBroccoliesMGS