I have ammo similarly marked in 357 SIG (Gold Dots) I bought years ago from Ammoman. IIRC, they were from lots that were rejected by LEA's after testing. They were rejected, IIRC, for having too much percentages of rounds' velocity measuring "around" a specified range rather than in it and a low percentage of FTF's.
The batch I have is good ammo and tested well in wetpacks. I have had no FTF's.