Minimum Equipment Requirements for Rifle Hunting in Zimbabwe
• Class A Game
5300 Joule
Minimum caliber 9.2mm in diameter
(Elephant, Hippo, Buffalo)
• Class B Game
4300 Joule
Minimum caliber 7.0mm in diameter
(Lion, Giraffe, Eland)
• Class C Game
3000 Joule
Minimum caliber 7.0mm in diameter
(Leopard, Crocodile, Kudu, Oryx / Gemsbok, Hartebeest, Wildebeest, Zebra, Nyala, Sable Antelope, Waterbuck, Tsessebe, etc.)
• Class D Game
850 Joule
Minimum caliber 5.56mm in diameter
(Warthog, Impala, Reedbuck, Sitatunga, Duiker, Steenbok, Jackal, Game Birds, etc.)

• Black Powder Rifles
Minimum caliber .40

But as Ozhunter says you probably would be able to use it by the outfitter even if the energy levels might be reach those levels.

Some guys have.

It all depends ...