This might be helpful, very likely an unfinished Boer projectile, extremely interesting.
Messrs Wright, Boag & Co., responsible for some of the casting; Delfos Brothers, etc. Pom-pom cartridge cases were also re-used and the section of the report
dealing with ammunition for the Maxim-Nordenfeldt reads:
‘The 1.5 inch guns were fired a great deal at the beginning of the war, so that the great stock at the Artillery Camp, received at the commencement of 1899,
was soon exhausted. In February, the “Gouvernement Artillerie Werken” received an order to make this ammunition. On account of the enormous difficulties
experienced, they were not able to make the first projectiles till the end of March. During the month of April, they made about 2 500, of which one third was
lost in the explosion. Afterwards, they supplied the Transvaal Government with about 3 500, of which about 1 500 were at the Powder Factory on 27th May
and were sent back to Pretoria with a great quantity (about 5 000) of re-formed and re-capped cases; of these 1 500 hardly one quarter was completed;
the remainder were not loaded or fixed in the cases.‘ At the Begbie factory, they left some thousands of projectiles in the yard whose casting had been stopped
a fortnight before the closing of the works.