Is 380 acp ammo different than regular 380 auto ammo?

i had someone suggest that they were different and i had the wrong ammo cause the gun has acp imprinted on it and it doesnt say acp on the box. the 10 round mag also seems difficult to load, and over 5 rounds in the mag it will only shoot once and the slide goes back somewhat like it was empty and then it wont... show more i had someone suggest that they were different and i had the wrong ammo cause the gun has acp imprinted on it and it doesnt say acp on the box. the 10 round mag also seems difficult to load, and over 5 rounds in the mag it will only shoot once and the slide goes back somewhat like it was empty and then it wont shoot so i drop the mag and pull the slide more and a round pops out of the chamber, what gives?
Update: and its a hi point (yes i know its a cheap gun but its new and shouldnt do this)
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