I ordered 3 new mags direct from Ruger. They were advertised as the correct part for my Mark I. The problem is when I insert the mag it will not go in completely and lock unless I first open/lock back the bolt, then they will insert fully and lock. Once they are in they do not feed reliably and jam often. My three original mags function just fine. Anyone have an idea on this? The original mags have a plain silver floor and the new mags have the Ruger logo in red on the bottom.