Went to range yesterday and was shooting a cz50 32acp when i felt my face get sprayed with something and gun jammed . Popped off the slide and noticed the bullet had not left the chamber much less the barrel. The casing haf the back halh on one side blown away pretty much a big hole in the casing right in front of the rim. This was only the second time this brass had been fired. Once as came from factory and this reload . Was using 2.1 grains of red dot a 77 grain slug cast from rcbs mold and standard cci primer. overall length was .950 brass was fiocchi. The only thing i can come up with is some how the gun fired before shell was fully seated as the bullet went only left the case and no further. Just glad i had my safty glasses on . When younger chances are i would not have had them.