I bought some as I thought they were if nothing else cool.
As a side note: My wife and I only carry factory ammo and got a great deal on Nosler Target 9mm HP. As was my understanding is some slow bullets do not open but are made in HO Form to make them accurate. As it moves the center of gravity back.
So wonder if that is really the case in cast HP's in 9mm-45acp etc.
I know that in some factory that they place a plastic filler to aid in expansion.
I had a few Balls from an AirSoft so put a few in to see sure looked nice if nothing else.
Disclaimer I am not a great shot so regular round nose or SWC is good enough for me. But wondered what real-life testing you guys have done with cast hollow points
Oh here's a shot of some unlubed
I have some Commercial Red Carnuba and Red Balls