Mr. Campo,

I do not believe that plunging fire would have made much difference in this situation. They were firing oriented north raking the spine of the ridge with canister. The area on the west face of the ridge was dead space and the guns could not have been depressed to sufficiently to hit the Federals as close as 25 yards. The Confederates were picking up the gun's trails in an attempt to depress the guns sufficiently to hit them.

I hope this helps.

Respectfully,

Gerald D. Hodge, Jr.
War Between the States Historian
Historian: 39th Georgia Volunteer Infantry Regiment
http://39thgavolinfrgt.homestead.com/39thHomepage.html