there are more options for shotgun shells than for bullets.
For bullets you can basically do pure copper. I think anything else falls into a 'armor piercing' category that is banned. I'm not 100% clear on the laws there but I know that is why most bullets are still lead core (in addition to cost factors).
lead ammo bans are a way to ban guns without banning guns themselves, similar to 'microstamping' and other odd proposals. Basically mandate something that makes it so costly that no one can do it
For bullets you can basically do pure copper. I think anything else falls into a 'armor piercing' category that is banned. I'm not 100% clear on the laws there but I know that is why most bullets are still lead core (in addition to cost factors).
lead ammo bans are a way to ban guns without banning guns themselves, similar to 'microstamping' and other odd proposals. Basically mandate something that makes it so costly that no one can do it