I was having this happen occasionally with factory mags and regularly with single feeds dropped in from the top on the factory mags. My expensive Waters mags resolved these issues. Take home is that I would be cautious on opening up the ramp or chamber because I don’t think that is ultimately the reason for the issue.To this day my biggest issue is now cases hanging up on the case mouth when entering the chamber. Happens with all factory ammo a small chamfer on the chamber would entirely solve this. For now a small case mouth chamfer is the solution. Does anyone have a photo of a factory tikka chamber?