Honestly looking more like BONE IMPACT damage than expansion .
As you well know shot placement is key and that you did without question. A dome would have been just as lethal.
That doesn’t just look like
BONE IMPACT, it was bone impact, as evidenced by the picture provided.
Now, is that expansion? Most definitely. Would it have expanded on flesh? I’m not sure, I have seen these Hades run the gamut from very little deformation like this .177 Hades out of my Sub 12fpe HW95.
To this! Bone or no bone, Hades expand. As noted above, by @vana2.
They also produce a noticeably more devastating traumatic impact on flesh as “soft” as an orange, as noted by @americanairgunner in this video
https://youtu.be/QiB0_Ggus1k
But frankly, some people, including myself, took exception to the “convenient” shot placement with the Hades off to the side. So I took that to task and conducted my own experiment only to see that regardless of shot placement, his results were plausible albeit perhaps a bit more pronounced. YMMV.
https://youtu.be/TJTrEmIvHVc