Circular lines in headstamps on 6,8 Barrett and 223 Rem

Does circular lines in these headstamps mean something?
And who is the manufacturer of 6,8 Barrett cartridge/case?

Thanks for any info

The Barrett case was made by Silver State Armory. I’m not aware of any special meaning associated with those curved lines.

The lines are common on a lot of SAKO ammunition. I am not sure if it has any meaning.

Fede and alpinehunter! Thanks!

I doubt there is any meaning to the curved lines other than perhaps decorative. I have seen the Silver State Barrett 6.8 cases.