Couple things I noticed after a brief perusal:
- The phrase "and anything else in its path" likely makes the photon beam cannon a tier infinity weapon, since it literally states that anything it hits will be obliterated.
- "Depleted" anything bullets are, well, depleted. Meaning they don't cause radiation sickness. As an aside, if you instead switch to actual radioactive bullets, Jin is almost certainly going to have to deal with cancer at some point.
- Hollowpoint ammunition sucks at armor penetration. It's specialized to do tissue damage by expanding on impact and hopefully transferring all its energy to the target and getting lodged inside it somewhere, which would only make any hard material it strikes even more effective at stopping it.