If the blood was spurting out, you probably hit either the common or external carotid artery.
The jugular vein is a low pressure vessel and won't spurt blood out but would rather leak blood resulting in it running down the neck and dripping to the ground. Also, venous blood is darker in color where as arterial blood is brighter red like you described.


Great story, not trying to pick on you, it's just that I've heard a lot of people make the same mistake of confusing the carotid artery with the jugular vein and it's a pet peeve of mine.