Granted on the bolt and semi auto types and their quality. I did not think that was an issue.

I doubt any gun would shoot loose on just one cull. I did mention repeated shoots. As said if anybody knows for sure please chime in.

I have seen the video where a bloke with a double gets 4 away quicker than a bloke with a bolt holding 4. The bolt was a 416 Rigby the double was a decent cartridge but I can not remember what it was. Not questioning the speed of the double in the hands of a person who practices and practices to develop the technique then the speed will come. I doubt the average ranger would do this and as you say the cost of obtaining a reliable double is beyond most PH's in Africa.

Agree about the bolt or FN/SLR for culling.