So no 5.56 MM only 5.56
Or in my case 300 AAC is just 300.
I thought that was spelled out on the form.
I had to resubmit today and re-pay (supposedly getting a refund), now waiting for another four months.
I've had a couple of submissions disproved. You will get a refund. But if you can swing it, fix the form and resubmit with a new payment. it will shorten the process.