@Historicus1324 It has been my impression that the 111th N.Y. engaged Wilcox's Brigade, specifically the 8th and/or 10th Alabama, having moved slightly to the right of the rest of Willard's Brigade on the orders of Hancock. If that is correct it would seem the regiment most likely to have shot Barksdale would have been the 126th N.Y., would it not, (see Second Day at Gettysburg by Schultz and Mingus). Just an observation.
John
John