With powerbelts in my Traditions flinter, the only thing holding the bullet from falling out of the barrel is the cup. I'm afraid that if I lube the post, I will lose the bullet out the barrel. I took the cup off of a bullet and dropped it in and it literally fell down the barrel on it's own. I would think that the bullet should touch somewhat. I'm told that they expand on the way out when you shoot. Has anyone ever retrieved one to witness the rifling marks?