ID this 5.56x45

Projectile appears to be two-piece and is gray/white in color - headstamped WCC 03, 04 and, 05.

The bullets appear to be commercial Winchester “Silver Tip”.
I would say those cartridges have had the military FMJ bullets removed and replaced by the Silver Tip bullets.

I think this is Black Hills manufactured RRLP (Reduced Range-Limited Penetration) Frangible with a 58gn composite bullet.

Thanks Jim, your reply gave me enough info to search with.

Here’s what I found;

Black Hills 5.56 RRLP MK 255 Mod 0