I have read that the patterns should superimpose(shoot together for folks in Rio Linda) at 25 yards. I've also read 40 yards. Some people even think(probably not a good word) that the pattern centers can somehow be fairly far apart at the muzzle and miraculously come together at the magic 25 or 40 yard mark. To me that's pretty darn silly. The chamber centers are maybe 1-1/4" apart and muzzle centers are maybe 3/4-1" part. How far could the pattern centers go apart on their way out to the desired convergence point? I shoot any newly acquired double from a rest, on a bench with the aiming point at 10 yards. My latest old Lefever, full/full shot a pattern the size of a large coffee cup, with a shot from each barrel. If they don't converge at close range they darn sure won't converge at longer distances. I have not observed the often quoted myth(IMO) about barrels not shooting together from a steady rest but will when shot off-hand. IME, if they are properly regulated they will shoot together all the way out from muzzle to any place within shotgun range. There's no black magic or mystery here.
Last edited by Jim Legg; 03/19/08 10:42 AM.