Nope, its not.. aftermarket match barrel which has a fully supported chamber.
I like how the post below yours mentions glocks unsupported barrel as if that could be the only reason for a case head separation.
There mine was, with a fully supported chamber, and it had a case head separation.. Over pressure, is over pressure and the cases can only take so much, no matter what barrel or gun they are in.. How the gun handles it, depends on how it is made..
Since they OP hasn't really supplied any further information, it is all guesses now.. Or as someone in another post suggests.. We're being trolled. I'll wait for the 9 vs 45acp or glock vs 1911 threads before I come to that conclusion.