The 201 has features one needs including brazed barrels and chrome washed bores. I shot some Hevishot through the one I used to own w/o problems, but mine was one of those ultra rare tubed guns (50-60 pieces? made that way). I used to screw in SS tubes ('Undertaker'?) that had gradual taper designed just for steel, tungsten iron, iron shot. The tube thread was Winnie/Browning STD invector type. Whatever you choose to use make sure you only use shells of optimal length for your guns' chamber (ie 3" in 3" chmaber). Try to avoid shooting 2&3/4 hard shot loads in 3" chamber, or English say there will be
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