Old shotguns and steel shot are not generally compatible. A set of screw in chokes could solve his problem. My M12 has a Cutts with an IC tube. That should handle steel.
Jack
"Do not blame Caesar, blame the people...who have...rejoiced in their loss of freedom....Blame the people who hail him when he speaks of the 'new, wonderful, good, society'...to mean ,..living fatly at the expense of the industrious." Cicero
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