Today I just figured something out about my rifle that makes me not so happy. I bought a 700P from a local consignment shop. I have always just single shot my gun cause I have only sighted it in and shot paper. I went to load my magazine today and the rounds will not stay. It looks like its factory but Im thinking someone had it opened up maybe for a detachable mag or something. the bottom metal looks factory too. My question is do people open this up normally and if so what can I do to not have a single shot. Thanks.