Regardless who made the gun, it has been my experience that the longer the taper of the choke, the pattern remains tighter to a further distance.The Remington Wittemore choke began it's taper at nearly the midpoint of the barrel, with the tightest portion back from the muzzle about 1 1/2-2", and then straight. The belief was that the shot column was more stabilized over the longer constriction, and didn't begin to open until well downrange. I may be over simplifying what I have come to understand, for which I apologize.
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