It was me.All of what he said is correct.I did the development work on the steel shot special when I worked for the Jaeger division of Dunns.We found that steel shot could pass throough up to .020" of constriction without stressing the barrels.Also the slightly longer leads to the chokes helped with large shot sizes.All of the other 12 gauge 28" barrels at the time were mod and full choked and the steel loads at the time would damage them.
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