They are no higher than Powerbelt bullets (copper plated lead) and they have great penetration and terminal damage and are all copper. See website, all animals were shot with Thor bullets and a CVA Electra. Thor ships free size samples for the person to determine proper bullet for each gun. Accuracy is good less than 1" groups have been common with the bullet. The cup/skirt is tough enough for use in Savage ML, Ultimate and other magnum muzzle loaders.