Forgive me I'm just jumping in, and new to the DD realm. But I cast copious amounts of metal. Mainly aluminum and brass and bronze. I also cast iron quite a bit. So an iron chill mold could turn out infinite pellet projectiles in low temp metal like aluminum or a denser alloy. I guess if it's too heavy it can damage the rifling or contain too much pressure? I fell into a LMT rail mount a few weeks ago and got a Pace defense frame, and just today while looking at my email on the can caught a LMT classic receiver from V1. Now Im so excited about a stamped lawn dart gun I don't know where to start!