At a match today, I picked up several WCC NATO brass along with my WINs.. I picked up one, that looked identical to the Winchester brass except it was stamped "WMA" "13" with the NATO stamp equally spaced around the head. It had the typical crimp ring around the primer hole.
I checked my Headstamp info sources and "WMA" wasn't listed. This is the first WMA I've ever seen.
Anyone familiar with WMA brass?