There is one thing about the PB's that is useful.
It gives us the lower end so we can establish what a bad bullet is as the next one up the ladder I propose the hard cast bullet which has its place on very big animals which require maximum penetration but is a problem on deer sized animals as they run for a couple of hundred yds and can be very hard to track with that neat round hole that likes to close up.
Maybe we should try to assmble a list by the effectiveness of the bullet. I might help the begginers.