Stan, I've never patterned it. I can tell you I've shot skeet equally well (96) with either one of those barrels. Even though both barrels are 3-inch chambered, I've probably not shot three boxes of 3-inch shells in the gun since I got it in 1970. I own five other .410-bore guns -- Crescent Fire Arms Co., New Empire, with .011" in both barrels; an NID Ithaca Field Grade marked 4 and 4 with .013" right and .024" left; a Winchester Model 23 Classic marked mod. and full with .012" in the right barrel and .028" in the left; a Browning Superposed New Model Skeet with .005" in the bottom barrel and .002" in the top barrel; and finally the Skeetmaster tubes in my Remington Model 3200, each with .004". I can tell you it is very hard for me to hit a skeet target with the Crescent or the Ithaca.
The Crescent is hard to shoot because of very heavy trigger pulls, and if I point the Ithaca just right it will ink blot both targets from station 4. I break skeet targets amazingly well with the Model 23, far better than I should with that much choke.
