Bevelling of the skull is seen in the following:
In the skull, the wound of entrance shows a punched-in (clean) hole in the outer table. The inner table is unsuppoed and a cone-shaped piece of bone is detached forming a crater that is larger than the hole on the outer table, and shows bevelling (sloping surface). Ref: The Essentials of Forensic Medicine and Toxicology by Narayan Reddy, 27th edition, Page 197.
Broad end of the entry point in bullet injury
Narrow end of the entry point in bullet injury
Exit point of bullet
Depressed fracture of the skull