This argument has always seemed a bit out of touch to me. You go to dark Zimbabwe and there isn’t even such a thing as a store, your supply is the PH. Every PH has a couple dozen boxes of .375 H&H with three to twelve rounds missing. .375 Ruger I haven’t seen yet in the local surplus supply chain. It’s less about being able to travel 8 hours to ammunition than it already being in camp.
This said I’m way less worried about this now than I was ten years ago when I first went over to Africa. Worst case now I’d just borrow a rifle, it’s become an inconvenience in my mind not a planning factor. But if there for work I’ll only bring a 7.62x39, .308, .30-06, or H&H.
Ammo availability is a complete non issue, it really is. People bring it up because they really don't have anything else to use to disparage the 375 Ruger.
Many hunters have gone to Zimbabwe with rifles chambered for much less common cartridges than the 375 Ruger. They seem to do fine.There are countless videos, forum stories and articles describing hunts using cartridges just like this. Or even something that is somewhat generic in Canada like a 45/70 or 300 RUM
, but unlikely to be in the PH's ammo cabinet.
Usually there is a little planning involved prior to going on a distant hunt and part of that planning can easily include making sure you have a supply of ammunition if you are concerned about it getting lost. This goes for hunting in remote areas on this continent as well.
Ammo availability is simply a non starter argument these days.