From October through December of 2010, I have had the opportunity to use a Pure Gold Waterfowl choke tube; specifically their Waterfowl Improved Cylinder choke. I've fired multiple brands and sizes 2 & 4 steel, as well as, other non-toxic loads through the choke while hunting puddle ducks.  Over these three months, I've continued to have success with putting a full pattern on decoying puddlers resulting in more birds in the bag and less cripples.  Pure Gold's Waterfowl choke has also withstood rainy days and days in the salt water with no ill effects. Overall, I would grade the choke tubes quality construction and ability to yield consistent patterns with multiple loads an A+. It will surely be used in my arsenal for years to come for everything from upland birds to large Canadas and beyond.