Well, this is interesting.
I don't get it. What's the point? By rough calculations, not accounting for wall thickness, a first strike round has half the payload of a normal paintball and that should be more than the payload of a .50 round.
Then, I suspect that those 'sabots' (for lack of a better term) will actually inhibit the paint spread, if they remain attached to the ball. This is because when a round hits flesh (or cloth covered flesh), the round sinks in a bit before fracturing and, the shell and the impact surface may completely enclose the round.
Maybe this isn't meant for regular paintball but, pure mil-sim (in the canadian sense of the term describing a game format).