M193 is supposed to be ammo that's mil spec. Correct me if I'm wrong, but that's what the "M" stands for, as we've traditionally seen on the Federal Lake City M193 ammo.
I understand the "M" spec includes crimped primers, but doesn't that spec also include a little spot of varnish over the primer, to keep out moisture? American Eagle's ammo has it. The reason I'm asking is that Winchester's white box 5.56 with "M193" on the front doesn't have this. Neither does Frontier's M193. If the "M" spec is supposed to include primer varnish, that means these companies are blatantly mislabeling their ammo.
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