I don't shoot twist or Damascus barrel guns. My Grandfather's 1890-vintage heavy 12-gauge PH-Grade twist barrel Parker Bros., and my Father's 1895-vintage 12-gauge Remington Model 1894 Damascus barrel AE-Grade have digested carloads of 3 3/4 dram equiv. and 1 1/4 ounce of shot Super-X or Federal Hi-Powers. Grandpa bought the Parker in 1901 and it lived on a farm where six boys were raised, all hunters, and it saw a
lot of use. I'd be willing to bet that Dad was using Super-X or their equivalent in the Parker for these early season Ducks at King Lake, Minnesota, in 1932.
Prior to getting his Model 1894, my Father had a Remingon Model 1900 KED-Grade. He gave it to his younger brother when he returned from WW-II. It finally suffered damage of the chokes being pounded out and breaking the solder holding the barrels together when my cousins used it during the early days of steel shot.