The problem has been reported with 12ga only. Section a new style AA and tell us that's not a base wad, it sure as hell is. The obvious intention was that under no circumstances could it come out of there, and if you cut up a properly made AA shell you would have to agree that it appears to be a safe design.
However... they had some manufacturing defects early in the cycle of this product, and some of them DID get away.
The MEC, of course, uses a spring to set the PRIMER.
There were some 'new style' shells made with the old AA block print logo and markings. I have some. They didn't start the HS balony until there was a PR need to justify the new design as some kind of improvement instead of the manufacturing economy move that it obviously is.
