Today I bought a new Diamondback .380. Really excited about the way it feels in my hand. Couldn't wait to shoot it. Load the mag with 5 shells and shot. Gun failed to eject a spent round on the third shot. Second mag (five shots) and a misfire on the second round. Third mag, misfire on the 4th round. Both misfired rounds had no pin marks and both fired without a problem when loaded a second time alone. Every other pistol I've owned I bought used and have only very rarely experienced a misfire problem. Is this normal with a new pistol? Will it improve with use? Or it this a real problem I need to go back to the dealer on?