Some say to use cast bullet data, others jacketed. I personally use jacketed data with good success. While these bullets are soft, they are also usually .001" larger in diameter just like cast, and they generate about the same pressure and velocity in my guns as jacketed. The plating is very thin, so do not push them to max velocities. Nothing over 1100-1200. With moderate loads the plating will stay intact until the bullet exits and give zero leading. Oh, also, go light on the crimp to avoid damaging the plating.

Loaded right these make excellent and cheap plinking bullets.