Dimple(s) on the rim?

General Firearms Reloading & Ammunition
1

I have some LC/Nato stamped 5.56 ammo, 01 & 02. Some have 1 or 2 small dimples on either side of the Nato mark. What does that mean?
TIA,
JDUB

2

It’s for the octal numbering system used at Lake City as part of the Small Caliber Ammunition Modernization Program (SCAMP). A numerical number is given to different positions around the case headstamp and the values are added together to give a number that indicates the station on which that particular cartridge case was produced.

3

Scamp…thats classic.
Anyhow, thanks for the info! I searched a bit but coulnd’t come up w/ a search topic that resulted in anything.
Also, thanks for your post on your ammo accuracy testing.