Well . . . they're not rifles, and the fact that you're throwing a pattern with a fairly wide spread makes up for some SLIGHT differences in shooting to point of aim. But think of it this way: If the right barrel were off significantly one way and the left barrel were off significantly in the other direction, then the shooters would have to think: "OK, now I'm shooting my right barrel, which means I have to compensate in this direction; woops, now it's the left barrel, so I have to compensate in the opposite direction. Chaos. But even double rifles are made so that the barrels shoot to the same point of aim at a given distance--and while a double rifle isn't a real long range weapon, we're talking longer ranges than even long shots with a shotgun. If it can be done satisfactorily with a double rifle, why not with a double shotgun?