I don't know about the extra 20 yards, but my cousin and I have been shooting them for geese in our Browning Gold 10's for several years now. They pattern pretty well with the larger shot sizes like B's, BB's, and especially BBB's and T's. With a 1 1/2 ounce load that averages 1550 fps, I average 89% pattern at 40 yards with T shot. That is what I use for my last shot on honkers. This choke works fine for decoying ranges or 25 or 30 yards out to about 45 or 50. We seldom shoot past 40 yards unless we have a cripple trying to get away. Zak