For several years I hunted turkeys with a Winchester mod. 97. It was made in 1911 according to the serial number. I used it precisely because it had an incredibly tight choke. When shotgun shells had just wads, no shot cups, these old guns had to have a tight choke to pattern well. In any case, I put maybe 100 turkey loads through that old gun with no ill effects at all. Lead is lead, the copper coating isn't thick enough to damage the chokes or barrels.