Ww2 machine gun / cannon round / -ID this ?

[T2672]

Found in Suffolk field, can anyone help ID this ? Definitely a rifle round and too large for small arms - appears to have a solid metal core with lead jacket and larger than .308 calibre

Many thanks

 

[The Basket]

Pointy or round nose?

If it's a round bottle nosed bullet then it's more Victorian era. Maybe Martini Henry or Snider? Won't be Lee Metford round nosed 303 as that's too small.

 

[T2672]

Pointy or round nose?

If it's a round bottle nosed bullet then it's more Victorian era. Maybe Martini Henry or Snider? Won't be Lee Metford round nosed 303 as that's too small.

looks like a flat nose but maybe had a tip ?

 

[T2672]

looks like a flat nose but maybe had a tip ?

 

[The Basket]

Black powder era. Is that paper patch? .577 Martini? Certainly flat nose 577 were about. Certainly worth looking at.

 

[warehamlad]

Copper jacket, steel core, 0.50 inch, probably armour-piercing incendiary, which explains loss of tip.
The boat tail is the end that was in the cartridge case and is not the tip!
WWII era, used by USAAF.

 

[T2672]

Copper jacket, steel core, 0.50 inch, probably armour-piercing incendiary, which explains loss of tip.
The boat tail is the end that was in the cartridge case and is not the tip!
WWII era, used by USAAF.

Thanks - so definitely not pre war small arms ?

 

[MiTasol]

Using your finger as a diameter guide this looks .50 cal
This may help

 

[GrauGeist]

Could it be possibly a 13mm round from a Luftwaffe type?
Their 13x64 ammunition was .51 caliber.

 

[MiTasol]

That looks like the case end to me which make sense as the damaged end meets the target first so is the end that gets damaged with most bullets