I am surprised the .30-06 was not more popular in Colonial Kenya. Effective with 180 and 220 gr projectiles. A 220 gr FMJ should penetrate well.

My guess is gun dealers mainly imported from the UK.

Perhaps it was difficult to trade outside of the British Empire? The Brits had exclusive trading laws in various industries, making it illegal to trade with anyone other than British merchants. How the Brits became wealthy. Sucked the lifeblood out if the colonies as middleman traders. My comments come from farming in Australia. Grain had to be sold to British merchants at a low price. They sold it to Japan at a high price. Like farming today with globalist middle men and monopolistic retailers.

So if gun dealers only dealt with Brit gun makers, resellers, it makes sense.

The only .30-06s probably came with American outfitters and PHs and clients.

Aagaard says this changed when Kynoch ceased trading.