The amount of bullet lead that gets recycled is probably quite low. None used by the military gets recycled. Very little hunting ammo is recycled. Very few outdoor ranges tear down and rebuild their berms so they can reclaim the lead. That leaves indoor ranges which account for what, 25% of all ammo fired? Eventually the amount of recycled lead won’t be able to support new projectile requirements, especially with lead-acid batteries still being used in cars.