Am I correct in thinking that this was a custom ordered headstamp by Creedmoor Sports? I've never seen this in Canada before.

Edited to add: Apparently it is. The IAA forum suggests that it was produced by Hornady for Creedmoor Sports.

Well, having Creedmore in the headstamp should raise the 223 Rem to a whole nother level.

drover

I guess this makes it a new cartridge. The 223 Remington Creedmoor.