Interesting.
I ask cause , I have found a good number of Spencer Cases from a few different places.
One is a small skirmish site I found or 'I think an Ambush ' by the Confederates on a few Union Riders or a patrol.
It was an est , 30 X 30 box where I found several fired Spencer casings + a area with about 7-10 Dropped Complete cartridges . & All around was fired Squashed 3 ringers , Round Balls (mostly Hard impacts , as the area was rocky) by all around I mean a 50 yard X 40 yard area ; tho some of the impact area was undetectable . Getting out to about 100 yards away I was able to find a few Drops 'Ga Teat's' & other Southern Style Bullets.
I think I found only 1 or 2 fired Spencer's ( but in a 300 yard radius from their firing site The land has been developed for decades.) So IMO what shots the Union Calvary did get off were likely out of reach , the area is also wooded now & was likely Farm fields in 1864.
I find it strange that (if the impact area was detectable that you did not find more fired Spencer's) Could be Somebody else hunted the area before you did.
Did you find many fired Confederate Bullets on or near the "Line".
Just Curious.
Thanks for your reply.

Davers