Whether you occasionally or regularly transport ammunition aboard a passenger aircraft, you should know how to pack ammunition safely and securely. Properly packaged, small arms ammunition for personal use can be safely transported aboard commercial aircraft
in checked baggage only. Additional rules from the airline, Transportation Security Administration and the Bureau of Alcohol Tobacco Firearms and Explosives may apply so check with each of these sources before you leave for your trip.
The Transportation Security Administration has a document called the
TSA Public Education Fact Sheet, Transporting Firearms and Ammunition Aboard Commercial Air Carriers that outlines the rules for securely transporting firearms and ammunition
Other information from TSA on transporting firearms and ammunition can be found from TSA
http://www.tsa.gov/travelers/airtravel/assistant/editorial_1666.shtm
The Bureau of Alcohol Tobacco Firearms and Explosives is a valuable source of additional information on firearms safety
www.atf.gov/firearms