🔎 UNIDENTIFIED ID on second slug

[Hunk-a-lead]

Requesting help for the ID on this next slug. Found in the same location as the previous Minie ball. It is much smaller but with similar patina. As always, but thanks in advance for the assist.

 

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[Almy]

Good to have the measurements. It appears to be a .38 Smith and Wesson Special pistol bullet. Factory made based on the knurled rings. Early 1900s at the earliest and used up to the present.