The Steel Shot Special can handle the tungsten shot. Less than .020" choke will allow steel or tungsten to pass through the choke without stress. I have shot many loads of both through my #26 gun with no damage or change in dimensions. For that matter, I have shot steel loads through original Parkers with open chokes with no problems. .020" choke seems to be the key factor. The more choke over that the more likely you are to stress the barrel.
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