Civil War Dug Artillery Relics - Can you identify?

[double canister]

A buddy gave me these, and I'm pretty well lost. Any help would be most appreciated.

[wartimecollectables.com]

Artillery shell fragments.  'Match" the parts and should be able to tell what size/type shells. Where were they found? 

[double canister]

Oral history is Gettysburg, but who knows?

[dhcoleterracina]

Sadly they always seem to claim that. 

 

There is a "dimple" on what appears to be the base of a Parrot 10 LB round or more accurately a Read round. The dimple indicates CS I think. The fuze looks CS too. 

[double canister]

Anyone else?