I had a DH with .045" choke in each barrel.With older paper shells it patterned around 75% with good even distribution.With "modern" ammo it threw donuts with no pellets in the center of the pattern.I think the tight chokes caused the pellets to cross as they left the muzzle.I killed a couple of turkeys with old ammo and then sold it.I never could get it to pattern any ammo that had a shot cup.
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