ID help

[modockowando]

Diameter at largest point (near top):  19.68 mm
Diameter at smallest point (near bottom): 19.22 mm
Length:  40.66mm (for what remains)
Site:  Southern coastal region Maine

[Dave the plumber]

  Sue,      I know you are new here, but just wanted to let you know that artillery is typically refered to in inches, not metric units.  And your typical artillery guy like me doesn't know conversion tables in his head, and I'm too lazy to look them up !!     No, seriously, we don't use metric units much when talking Civil War artillery, and even when issued back in the 1800's artillery was refered to in inches down to the 100th of an inch, or in weight poundages.
           I can't tell from your photo's what the object is, it is a little too dark to  see.  Sorry, wish I could help.

[modockowando]

Thanks for the tip on taking measurements.. I have tons to learn. It could be that this is not worth the time but I have always questioned what it might be. 

It is .75" in diameter and 1.60" long. 

Also sending along new images.

[John D. Bartleson Jr.]

No idea here!
John

[Selma Brooke Gunner]

I havent a clue as to what it could be.

[Pete George]

  In view of its dig location (salty Maine coastline), and its shape, diameter, length, and metal-thickness, my "best guess" is that it is an old compressed-CO2 cylinder, for a pellet-gun.

Regards,
Pete

[modockowando]

Hey thanks!  I doubt if I will ever find anything too large up here.  Given this, I guess my imagination can get away from me at times 

[Jim T]

Oh, there's some bigger stuff to be found in Maine.  In fact, we're heading back up tomorrow to find some more goodies!

[modockowando]

Sweet!  Hope you haven't run into any bear in that location!! 

[R. J. in LA]

Great find Jim, did you find any others the next day?

[Jim T]

Dug a 12-pdr, 6-pdr and a 1-pdr this past weekend. 

[CarlS]

How cool!!!  It's on my bucket list to one day dig a Rev War ball.  Congratulations!!