I have to admit I would be very concerned in getting a high end power cord that does not fit snuggly. This is one of the characteristics that goes up in high quality power cords. I would return it.
The best sounding power cord I have purchased. Audio Quest Hurricane, is so tight (I have more than one) that it takes a tremendous effort to get off and on. Not because of the outside… but conductor contact. I am sure this is one of the parameters making the cord sound so good. Although all of the high quality cords I have purchased fit snugly at least.