Good Day!I just obtained a Mauser 1914. It is in nice shape. I cleaned it and replaced the recoil and striker springs with new Wolff springs. When I fired it today, the third round in the mag would consistently stovepipe feeding the round. Would this be a magazine issue?It is an accurate little pistol!Are aftermarket magazines ok to use?Is there a way to loosen the magazine catch up a little?Thanks.