20mm projectile

[Dwight]

This is a 20mm projectile but there is no markings/colour on it. Is it possible to tell what type of projectile I have here?

 

[ron3350]

This looks like a 20mm Hispano Ball projectile from the profile and marks on the side or base have rusted off?

 

[Dwight]

Many thanks for the quick answer! And yes, it looks like the marks have rusted off. The projectile seems to be solid and I guess "Ball projectiles" should be solid?

 

[ron3350]

Yes it has no filling, just a base plate. Next time give the dimensions too.
It helps the guessing competition if we have a length, diameter and base diameter too. I hope I was correct with ID. Ron.

 

[Dwight]

Again many thanks! The length is 83mm and the diameter at the belt is 21mm. The diameter at the base is 19,5mm.

 

[rigby]

Here are the measurements for a 20mm HS404 bullet.
It is not a ball but the dimensions are the same.

 

[ron3350]

I measured 3 loose 20mm Hispano Ball projectiles and got the following dimensions.
Length from 83.3mm - 83.6mm.
Base was 19.5mm. Body was 19.9mm. Drive band approx. 5mm wide.
From these dimensions I say it is possibly a 20x110 Hispano cannon Ball projectile. Could be British or USA or ???

 

[AMMOTECHXT]

Many years ago I found one of these projectiles on my favourite beach. It was just another lump of rust, probably a piece of shrapnel, so I thought. When I knocked off the rust the base plug fell off and the interior was hollow.