The original CCI Blazer (It was
all Aluminum cased then!) had a Berdan primer which was 4.4mm, same as SP except no anvil. This was to discourage reloading. The cases were clearly head stamped N(ot) R(eloadable), and finally CCI literature stated unequivocally that these cases were
not to be reloaded. The extreme emphasis could leave no one with the intellect of a donut anything but the idea that CCI considered that reloading of the Blazer cases was
DANGEROUS! They also said the Aluminum cases
were not to be used in rifles! They even gave the reason that this could result in head separations!
But then what does the manufacturer know about their own product???
I have seen absolutely nothing which would indicate that the situation described above has changed one bit. Even if I bought factory ammunition, which I rarely do(!), I would defer to the manufacturer and respect their warnings in a case (No pun intended

) like this!!!!!!!
But go ahead and do what
you want! Just don't blame CCI/Speer/Federal when one of these blows out and damages you and/or your gun.