I have been reloading for a friend's custom 375 H&H Magnum which is built on a Winchester Model 70 action. I have been having problems feeding empty cases into the chamber single shot style. I have been trying to chamber the fully resized empty cases before I reload them because I have had few problems feeding the loaded rounds as well. If I just lay the empty case on top of the magazine follower, the bolt will not fully close on the empty case about a third of the time. If I push the case down into the magazine first, they all feed fine. Have other people had this kind of problem with Model 70 action?