You got GAP instead of ACP or just bought too many?
Either way I would return it if possible.
I came home after a losusy day at work, open the Midway flyer read it wrong & ordered. They do not do returns on ammo!
Try the glock forums yet?
Lets face it the only thing this caliber does that the .45 acp does not is cause confustion.
Six hundred dollars worth of GAP ammo? woops! At least it looks like you have a buyer(s) above.