Bullet casing identity?

[MCollett]

Found about 6-8 inches down under a large root of an oak tree. The woods borders an early to mid 1800s site. The casing has weird crimp marks at the bottom. The headstamp is readable but I find no matching stamps when searching. It has FC in the center of the head. I assume that's the Federal Cartridge Company from the early 1900s? It has rings inside and is short and fat. Large caliber?

 

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[firemanphob]

Looks like the end of an electrical fuse to me. no primer or rim.

 

[Icewing]

Looks like the end of an electrical fuse to me. no primer or rim.

Correct

 

[MCollett]

Ha! Well that's funny. Looks a lot like a casing. I guess since I found several bullets in the area, I assumed it was a casing. Thanks!