As for molding your own ..you can . But if your going to try to optimize your round by reloading you might try buying some factory precast ones there are so many styles .
@Powderflask I would first see if i could find a manufactured slug that meets your needs or is close. Then based of that see if you can build upon it ( shape , charge , etc) Then start to look at casting / but there are literally tons of slug types .
