Not yet, but I came VERY close when flying Airlink from JNB to TET.
No one told me that I needed to take my ammo out of my checked baggage to become an additional piece of luggage.
Someone (I have no idea who), just cut the TSA lock on my primary bag and took the metal ammo box out and made it an additional piece of checked baggage..
(An Airlink employee probably deserves credit)
I got extremely lucky.
When I got to Tete, my PH told me that he didn't know where to buy ammo in Mozambique.
(I was carrying .470 NE and .416 Rigby ammo).
When I got to camp, there was some .375 H&H ammo and a few rounds of .458 Lott.
I guess I would have been forced to use my PH's .458 Lott, if my ammo didn't make it.
Our game scout had an AK-47. But, I don't think he would have let me use it on a buffalo...