There has been a curious turn concerning my buffalo hunt this summer in Tanzania. Rather than using my .375 it turns out I'll be using a John Wilkes .500 Nitro double rifle. One of the more interesting aspects of this change was the shortness of breath I experienced when I priced out ammo from Westley Richards, but that is not the subject of my post.

Although I have quite a bit of experience shooting powerful rifles, I've never had a double in my hands, not even my shotguns have been doubles. My question then is, how much time should it take an experienced rifleman to become comfortable with this type rifle? If you have any techniques or tricks, I'd be happy to hear them.