If your ammo gets lost or stolen how readily available would it be to buy some 375 H&H or 300 Weatherby Mag ammo in South Africa?

Never had to find 300 w mags but 375 H&H are readily avail.

Ammo, I was told is pretty pricey in South Africa, No problem on common calibers, they have them, however, weatherby mag ammo might be a challenge. but to cure the theft problem, just put your ammo in your "locked" firearms case.