Unknown 30mm Armor Piercing Projectile (Pre-WW2?)

[M8owner]

I bought this on Gunbroker as it was inexpensive and interesting. I thought it might be an Italian 37mm tank AP projectile from before WWII. However, it is 30mm exactly in diameter across the body, and the driving bands are 31.5mm wide - about 100mm long. It also has a sheet metal ballistic tip - very unusual for a small round. I look forward to your observations.

 

[M8owner]

There are no markings on it that I can detect.

 

[sgdbdr]

Looks like an US practice XM639B1
See https://forum.cartridgecollectors.org/t/slics-2023-finds-for-me/54309/2



Cheers,

S.

 

[MINENAZ16]

Good eyes Sgdbdr.
Maybe a slight difference, only one groove beneath the driving band on xm639

30 x 100mmB WECOM Ammunition Box, Lake City 1969

XM 639 percussion primed casing picked up off range. Sun and weather has faded markings. Plus it was lacquer coated to save what there was. Hard to for me to photograph. CTG 30 MM TRNG XM 639 LC-2-31-10-69 Joe Edit. Additional pictures of projectile missing nose cone...

forum.cartridgecollectors.org

 

[M8owner]

Thank you for your help, Gentlemen. If anyone desires this for their collection, it is surplus to my requirements.