Origin of bawl Middle English baulen (found only in gerund, gerundive ) from Medieval Latin baulare, to bark and uncertain or unknown; perhaps Old Norse baula, to low like a cow; both of echoic origin, originally
A clip is what holds the ammunition and is not a feeding device like that of magazine. Clips are just metal pieces. A magazine has springs attached to it, which makes it a feeding device. As springs are not seen in a clip, it does not act as a feeding chamber. So in simple terms, if a spring is present, then it is a magazine and if no spring is present, it is a clip.
A falling or erratic EGT bar or rough engine constitutes a bad mag check and warrants troubleshooting the ignition system before flying. The mag check is poorly named, because because the vast majority of bad mag checks are caused by spark plug problems, not magneto problems.