We served it with rice and beet greens.
I didn't get any pictures of the boomstick portion of the day, but I have an after event photo of the cartridge that caused a premature ending to the shooty goodness.
The headstamp was marked RORG 90 which indicates this cartridge was likely surplus British 5.56 from Royal Ordinance Radway Green. (I have no reason to suspect the cartridge was a reload, but it is technically possible.) The case ruptured and caused a failure to eject. It was stuck fast in the breech and I didn't have a rod with me at the range, so I packed it in early.