Dug Civil War Birge's Sharpshooters Dimmick Rifle Bullet from Shiloh. Rare Solid Base
Each Dimmick Rifle had its own bullet mold specifically made for each rifle which is why there are many different caliber bullets found in the camps.  
By 1863 the sharpshooters were rearming with the Henry rifle.
Measures .44 inches in diameter and .86 inches in length.