I think you're referencing GaryW's post,
Which is found here. If that's the case, Gary hasn't been back since 2013; but he did note the primers were extremely flat...
Another thing to remember is the dates and suppliers. I'm not positive back that far, but believe that TAC was a Eurenco product then. Regardless of whom it came from, it is now being sourced from General Dynamics; so it's not the same powder. I quickly jumped to Ramshot's page, and they no longer list that powder for the Waters.
Cheers, and welcome to the forum.