My definition of accuracy is probably considerably less than most others. I would consider a double that shoots with out the barrels interesecting at 100 yards into a 5" group as a tack driver. If its good enough to stick meat on the dinner plate, its accurate enough. (Not that I would hold a bolt to the same requirements of accuracy; that I deem 2.5" or less group of 10 rounds at the same distance.) I believe I heard somewhere that Jeffery held an opinion of accuracy as being 3 inches. H&H at 3 or 4 inches, along with most of the other big English makers. (All for doubles, not bolts, obviously.)

That all being said, I am a horrible shot. This shows how bad I really am. (300 Yards, M70, .30-06, 4X Old generic scope, freehand, one flyer down and to the right just off paper about 1/4".) Basically, my point is that more than likely, with a proper load in any given double, its going to shoot better than I am capable of. The direction of twist question wasn't meant to confuse it with a bench rest .20-something ultra fast throat erroding annoyance rifle level of accuracy. Just to squeeze the accuracy of the quality double down by maybe a .25" tighter. And obviously, it plays a role if someone has seen one with opposing twists that shot great for a doubles level of accuracy (along with proper regulation). Thank you for answering a nagging question.