Does anyone know when cannelures were first used?
The reason I ask is because my son-in-law is an avid user of metal detection equipment. He recently found, in a section of our downtown which is under construction, an old bullet which has a cannelure and a hollow base. He tells me it is approximately .35 caliber and weighs about 200 grains. Other articles found nearby appear to be from the late 1800's. He asked me about the cannelures and I had to admit to never having heard the origins of this feature.

Can anyone help?

Jim