I held the same facination with these stories and the men who carries these rifles.
I know of two people who have hunted Africa. My boss, who is a Millionaire, and told us of some of his encounters.
The other is my son's friends dad who works at the facility which used to be the tank arsenal in Warren Mi.
He works for a company that does a lot of contract work for the government and he has gone over a couple times on budget trips, where he helps out with certain chores, packing for road trips, cooking etc, to keep the cost down.
His family room has many animals on the wall.
Greater Kudu, Elands, Gemsboks, warthogs, and more.
I don't think either one of them used doubles in their excursions.
I can't tell you a thing about the Double rifles tho, except they are expensive.