I guess I've never noticed this, but I found a few boxes of WWB 5.56 and bought ten.
Loading mags today I see all kinds of head stamps,
WCC 13
WCC 13 WW 5.56
W C C 1 3
Some have a sealer some don't.
The bullets themselves look different as on some I can see the crimping cannelure and on others it is inside the brass, yet the brass length is the same and the cartridge length is the same.
Is this pretty normal?