Fuzzy math here, but that guy over on that other board has it all wrong....them double guns with the trapered bbl's laid side by side cross over about 10 inches in front of the barrel and because of the rotational forces of the earth they cross over again at 100 yards, right to left in the northern hemisphere and left to right on the southern. I know because I am a Gunsmith and I had a Double rifle in my shop once about 1987

...yes I have been into the Christmas Cheer, what makes you ask?