For anybody who still has doubts, the photos below are absolute proof that that form of shotgun-slug, which has slanted ridges on its sides, is NOT carved, but is instead a 20th Century shotgun-slug.
The "ridged" slugs were made for use in rifled shotguns.
The photo showing several varieties is a bit too dark for me to be sure whether or not it shows a Barnual (brand) slug with a 5-point star on its top. Perhaps somebody here at T-Net knows (or can find out) whether Barnaul is the manufacturer of the star-marked slug. Barnual is an ammunition manufacturer located in Russia... and that company may have used the Soviet Russia star symbol on its shotgun-slugs.