Sorry the pic is upside down. Here's the best measurement I have at this time. The weight read 0.02 oz. I hope this helps. I'm getting mixed results on weather or not this is Civil War era. I truly hope this is my 1st Civil War Relic.
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Thanks for the measurements, I was able to find out that the bullet is a .25 caliber. Unfortunately the first .25 caliber gun/bullet was not designed until 1905 making it not from the Civil War era. Even though they still make .25 caliber bullets, this bullet appears to be fairly old. It is not copper jacketed, there is some nice old patina, plus it has rings, the new .25 caliber bullets have vertical lines about 1.5 mm long instead of rings. I edited you photo to make it easier to see the measurements. I think you wrote the weight wrong because .02 oz would be very tiny, so I figured that it was .2 oz, which makes it 87.5 grain, being .25 caliber. Than I wanted to check with the width, which is 1/4 in, being 6.35 cm, also being 63.5 mm, it ended up being exactly 0.25 calibers, consistent with the weight. Thanks for letting me know about the measurements, without it I would have been lost.
One more thing, now with the measurements of the bullet I can tell you that the brass cartridges are .22 calibers because of the relationship between the size of the bullet and the casings in the first photo, and with the only possible size smaller than the bullet being .22, I'm sure that's what it is. Also the bullet on the left is the same size as the .22 casings it is also a .22 bullet, because most .22 bullets from the 1800's have rings to stabilize the bullet inside of the barrel so it will come out more accurately, and this one doesn't, meaning that there was mostly likely newer technology in the barrel to stabilize the bullet.
Here are some civil war bullets (found on a Civil War battlefield in Maryland), and some 1700's-1820's musketballs (the round balls), musketballs were the only bullets used in the revolutionary war, but these musketballs were not found in an area that had any Revolutionary War activity, but were likely used for hunting in roughly the same time period (Some pre-Revolutionary War, some post-Revolutionary war) The Civil War bullets are miniballs, and carbine bullets, and have the right measurements, and characteristics for those bullets, the Civil War bullet photographed by itself is the most common kind of Civil War bullet, the three ring Mini-Ball.



Coinman123,