Here's picture of solid turned 12ga slugs that Rob makes.
They are flat on one end and hollowpoint on other.
They can be shot either direction. Aluminum ones
are 346gr, brass 1080gr........If you need any
contact him. He, RIP, and others on AR are testing
them with different powders. I have gotten similiar brass
ones to 1900 in NEF with RMC case, with
140 gr the new RL-17. Ed