I will play the Devils Advocate--
The question is do you trust your African gunbearer with a Kreighoff firearm he can activate in a blink if carried wrong? Then you have aloaded Double swinging about pointing at everything.
I believe in Murphy's law, If there is a possibility for a screw up it will happen--

Pardon my paranoia and I certainly mean no offence to others but methinks another type Double requiring breaking open and loading might be better as a second Double when carried by a gun bearer--