That would defeat the purpose of the shrouding around the gong or metal plate.
The CFO is the one who mandated shrouding to prevent splatter from exiting the shooting bay, when using solids.
Apparently, it doesn't happen on steel, (using shotguns and lead shot).
Using that logic, I recall Bearchild Potts nearly had the inspector convinced that CAS shooters, who use lead bullets only, didn't need to shroud their targets, but that attempt failed.