Identify Anti Aircraft shell etc

[30Three]

I picked up what appears to be a 1" AA shell at the weekend. I believe it's 1940 date, would like to find out if I am correct in thinking it's AA and what gun it would be fired from. It has a solid boat tail ogive, much like a rifle bullet. Primer appears unstruck.
I have placed a .303 case and 75mm French case for comparison.
Also this particular 75mm case appears blown out around the central section. Could it be from being fired in a well worn breech? It does not appear to have been hammered. It is of 1918 vintage.

Attachment 93812Attachment 93811Attachment 93813Attachment 93814

Information

Warning: This is a relatively older thread This discussion is older than 360 days. Some information contained in it may no longer be current.