The one on the left certainly looks promising, somebody on here like Cannonball guy will tell you for sure, but they are gonna want length and diameter...FYI. HH
I agree with recondigger they are modern .
I used to camp at Berlin when I was young, just down from Columbia boat dock. Never detected there but found a couple nice arrowheads in the lake when the water was low. One is speckled pink and white, only one of that color Ive ever found.
We need the measurements in inches. Calibers are in inches, and if you want to know exactly what bullet is, speaking for myself, at least I would have to have the bullet measured in 100ths of an inch. Example, 45 caliber is .45 100ths of an inch. The bullets for my .45-70 are sized to .457 before I reload them in the case. Perhaps there are folks on the net that are younger than me that can relate metric to inch. I can't.
Chicagobulls567 wrote:
> The bullet on the left is 10 cm tall, with a diameter of 4 cm.
> The bullet on the right is 6 cm tall, with a diameter of 3 cm.
The US penny in the photo shows your measurements of the bullets are entirely incorrect. A penny's diameter is 19mm (1.9cm), which is approximately .75-inch (3/4-inch). A 10cm tall bullet is 2.5-inches tall, and a 6cm tall bullet is 1.5-inches tall... and neither of your bullets are that tall. Even if you meant to say millimeters instead of centimeters, that's still wrong, because a 10mm tall bullet is a little under 4/10ths-inch tall, and a 6mm bullet is a little under 1/4-inch tall. The penny shows neither of your bullets are that size.
Comparing your bullets' sizes with the penny, I'd estimate that the larger one is a .45-caliber to .50-caliber, and the smaller one is .22-caliber or .25-caliber.
Neither of your bullets is from the civil war era. The .22 or .25-caliber one appears to be a "copper-jacketed" bullet, and copper-jacketed .22 or .25-caliber bullets are strictly 20th-Century.
We'll need correct measurements of the larger bullet's diameter and length to ID it and tell whether it is from the latter-1800s or the 20th-Century.
By the way:
The smaller bullet shows multiple tiny parallel ridges inside its body-groove. That is called a "reeded groove" or "reeded cannelure" or "knurled cannelure." That did not exist on bullets until about 1880, so when you see multiple tiny parallel ridges in a bullet's body-groove, the bullet is from later than the civil war.