I don't really know what sort it was. To be honest, they all look the same to me but it had a Rolls Royce engine because I kept one of the damaged rocker covers for ages. The ammo was all 1941. The tracer was still quite accurate but the actual trace wouldn't ignite regularly and we fired some of the AP at a 'falling plate' target (steel plates made from armour) and they wouldn't penetrate as any AP usually would.
As for the incendiary.......... I broke one up and set fire to the incendiary compound. It fired up alright but kept burning for a while. I tried to blow it out........ BIG mistake. It just erupted into a ball of fire right before my eyes!!!!!!!
We had a short saying in the Armourers world...... Well, we had a few actually, most not printable. It was that Armourers NEVER deal with ammo and Ammo Technicians NEVER deal with Small Arms