The other year in traveling to Namibia. The TSA locks are junk. They want you, to use your own locks. The key stay with you. Don't go through England. They will take you firearm away. If you can get a direct flight from the the USA to the country you are going. Do it. A lot of the times going to Namibia you will going through South Africa to get there. You will never see your firearm until you get to Namibia. There you have to open the case up for inspection. They want to know that it's your case and the key is the proof. I get there a day early just be sure everything arrived there and I didn't get delayed somewhere on the way. Fights can get all screwed up in Africa. You don't have to do that, but that just me. Have a $150.00 cash or so to convert to their money. In South Africa you will need there money to purchase items. Get an international credit card so you won't get charge extra money using US Dollars conversion. Barclaycard US will work. That way you don't have to carry a bunch of cash.
The ammo is locked up in your rifle case with the rifle. Kind of funny to me. You end up with your rifle at the airport, with the ammo in the case. If a bad person, I feel that wouldn't work. As you are traveling your rifle will end up at customs. I would avoid NY. It's a pain in the ***. If nothing else fly into Germany. Been in Namibia twice. Make sure you have your permits from the guide to get your firearm at the Airport. They will want inspect the rifle. Be sure if there any lock ports on the case, have a lock there. They only want you to be able to unlock the case, not anybody else. Don't put the keys into other baggage. Have them on you. You could put a key in your carry on bag too.
BE SURE TO GET A TOP OF THE LINE RIFLE CASE. I watch several years ago an airlines person throw a rifle case to the ground several times. If I could have gotten to him. I would have Kick his ***. There wasn't anybody around to show what was going on. The weight amount is greater going overseas. Check with the airline on what they want also.