shell and big bullet?

[thedukeofdelaware]

Found these on the beach. The larger shell measures 2.38 inches in length and 1/2 inch in diamter. The smaller, heavier one measures 2.26 inches in length and 0.41 inches in diameter. Thanks!

 

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[TheCannonballGuy]

20th Century copper-jacketed lead .50-caliber rifle or machinegun bullet, and the same ID for the other one except it is .40-caliber or a "nearby millimeter" equivalent.

 

[Old Pueblo]

.50 cal, probably from WW2. The one on the left is a tracer round, the other one not.

 

[NOLA_Ken]

Yup, the thinner longer one is a tracer, or was rather. the heat from the phosphorus in it caused the deformation.