Postman,

Here's an opinion, (you did ask after all)

I am of course assuming that your planning to head to the field at sometime in the future, and if so I certainly wish you the best of luck (to be combined with your skills as a hunter), but accuracy-shmacuracy, I think you are kind of missing the point behind hunting with a double.

I'll leave the discussion of ballistics to the experts who peruse these forums.

But if you intend on hunting the greatest game in the world, and your doing it with a double, then plan on working your way in close. You are not out to shoot prairie dogs from a comfortable rest after all.

Find yourself a good Zimbabwean outfitter, and tell him that you aren't shooting anything at more than 50 yards. Stay away from any fenced properties and any put-and-take operations. Go hunt a real wild bull, and when you are close enough to smell him and you can hear the flies, then give him the left and then the right for good measure.

At close range, and inch or two shouldn't matter.