This weekend I took my new I. O. Inc Polish Sporter out for the first time. It shoots dead on but it will not feed under its own power. If I manually work the action it will feed and extract just fine. After I shoot either the bolt will recoil and then close back on an empty chamber or it will stop right before it would strip a new round. When it does this the old empty case is usually just sitting in the action and you have to shake it out. Ive used the two poly mags that came with the gun along with one steel mag and they all had the same problem. Also I am using cheepo Tulammo dont know if that would cause this problem tho. Thanks for any help.