I would not be surprised to find that at least some of the production strap weights, are cut from an extrusion. https://pureleadproducts.com/lead-extrusions/Great point. I can't believe I didn't think of that. Swaging lead bullets is done to provide uniform density, and softens the bullets in the process. Some buddies are really into it for long range muzzleloading. So perhaps commercial lead strap weights are cut from sheets, or stamped to soften them?