I got rejected when trying to ship a couple of 10 round boxes of 28 bore Bismuth shot a few years ago. I went home, repacked them then labeled them with the appropriate labels for shipping smokeless powder and they took them with no comments other than "This is what it'll cost to ship" then "thank You. At that time I was very well versed in Hazardous material shipping due to my job requirements. It was perfectly legal.