The verbiage goes something like this….
“Ammo must be packed in original packaging OR packaging specifically designed to store and transport ammo.”
The plastic MTM cases that hold rounds like this are acceptable.
The 20rnd one is the one I used for my .470ne ammo to Zimbabwe; notice the paper towel stuffed in the lid to prevent rattling.
My hand loaded .300Win Ammo went to Zim packaged in these boxes I get from Midwayusa
So my .470ne was in the 20rnd plastic MTM box and the .300Win in the cardboard & styrofoam box above - then placed inside my pelican style ammo carrier.
100% smooth through all customs…. USA, South Africa & Zimbabwe.
Yes they will count your ammo… they counted mine and NEVER said a word about it NOT being factory packaging.
I know people take reloads and put them in factory ammo boxes…. I think this is dangerous and quite frankly ignorant unless you label multiple sides of the box with “RELOADS”
It’s actually law in the USA that if you pack your reloaded shotgun shells in factory boxes to label at least 3 sides of the box with RELOADS.