Pardon if this is an already answered or common knowledge issue, but I recently inherited a Savage 99 in a take-down model. I don't know much about these guns. I bought a box of ammo, .303 Savage, but I can't get the rifle to fire. It loads fine, but working the lever doesn't seem to set the hammer. Is this a common issue? Or is this gun destined to be a non-functioning wall hanger?