Split leather is leather created from the fibrous part of the hide left once the top-grain of the rawhide has been separated from the hide. During the splitting operation, the top-grain and drop split are separated. The drop split can be further split (thickness allowing) into a middle split and a flesh split.
Excruciating pain. It all depends where the bullet enters. A person shot in the brain will likely perceive no pain as the trauma usually renders them immediately unconscious. A bullet entering a limb such as a leg is initially perceived as a hot sting. Within 20 minutes a throbbing, pulsating pain is experienced.
Gunshot wounds are one of the most traumatic injuries you can suffer. It's difficult to assess the extent of damage done by a gunshot wound, and it typically far exceeds what you can reasonably treat with first aid. For this reason, the best option is to get the victim to a hospital as soon as possible.