I've been having occasional misfires in my new Millenium PT111 G2 9mm but just figured it was an ammo problem. But today a more knowledgeable shooter than myself was shooting it and it misfired THREE TIMES in one clip. He examined the misfired bullets and not only were the indentations on the primers shallow but they showed shallow double-strikes. What's going on here? Do I have a bad gun?