Odd 1863 Indian Head Cent

Soooo, I recently had a buddy give me a box of coins, that he found in an ottoman that his girlfriend bought at a yard sale, to evaluate. His neighbor offered to put them in his rock polisher and shine them up, but thank the lord he decided to show them to me first. Even if they were 1992 dark side plastic crap, I would wince if I had to see them go into a rock polisher. (no offence to collectors of dark side. )

Among the usual junk, (1975-2000) darkside coins from some vacation, arcade/souvenir tokens, 1940-58 LHC, some darkside silver, and a couple V nickels that could only be improved by a trip through a belt sander, etc were a few 'gems'. No CC morgans, or s- VDB's, but comparatively 'gems' none the less.

3 50s-ish silver Canadian quarters
a 1944 Indian 1/4 Rupee
a 1911 and 1929 Canadian dime
about a dozen common date IHC
All above G-XF
An AU55+ 1899 IHC
An 1877 Liberty Seated dime (~F15-20)

And then there is the reason for this post.

There is an 1863 IHC that is almost twice as thick as it should be. It is significantly worn and pitted. If it wasn't pitted and damaged it might grade G-4, probably AG. But it was so much bigger I noticed it in my hand before I even looked at it. While looking the coin up I found the weight should be 4.67 grams. Well, apparently my scales are way off. The 1899 almost MS coin weighed in at only 2.95 grams, so waaaaay off, but still a valid tool for comparison. The 1863 came in at an almost normal 4.35 grams, but almost 50% (47.5%) heavier then the AU coin... I'm kinda miffed...

Please don't scream too loud I will upload pics ASAP, and tomorrow I will get my Dad's reloading scale, and steal his calipers, and hopefully get some more accurate measurements, but any first thoughts?

Thanks,
Bnuts