Does this violate the Geneva Convention?
No, the Hague.
The reason it wouldn’t apply to our own ‘lovely’ SSA is because a) it’s not military, and b) the Hague covers only war-combat (ie conflicts of the signatory states).
No, the Laws of Land Warfare apply only to unformed combatants. And, further more, the military uses 2000lb HE bombs against personnel, so what would a hollow point do that isn’t already beng done? In fact, much of our ammunition in use today is not solid/full metal jacketed projectiles. Snipers use match bullets which are in fact hollow point commercial bullets, improved rifle ammunition for general use includes similar bullets and a new round is a steel pointed, copper/zinc alloy (gilding metal) main component round (M855A1) that is designed to both penetrate hard barriers as well as produce increased lethality in soft (human) targets. The conventions restrict projectiles which are intended to create superfluous wounds designed to increase suffering. Ours are designed to incapacitate quicker, with fewer hits, thereby reducing the excessive wounding of enemy combatants/illegal combatants; the goal being to stop them from harming our troops more effectively (after all, it is combat).
Anyway, our enemies and militaries around the world use projectiles designed to increase wounding charatceristics by use of materials or design or both, some within and some outside of, convention protocols.
Any weapon issued to a US warrior by our military is able to be legally used against any individual enemy, although using a $500k 2000lb GPS guided precision air delivered munition against a threat person in the open when a sniper with a $2 match round is available, in range and able to engage may be a waste of resources....