Originally Posted by Rohirrim
Isn't the common term for a .45 caliber pistol an automatic?
Can't speak for everyone, but I've never heard a semi automatic handgun referred to as anything but semi automatic or semiauto. At least not in conversational terms.
This would be like someone talking football using a phrase like "Two-back set" while counting the QB. Technically correct... but a clear indication that the person speaking is pretty unfamiliar with the topic at hand.