In the 80's a group of these aircraft digger types unearthed an old RAF WW2 fighter at a village called Wootton near here. There were boxes and boxes of ammo, all or most still looked sort of OK. The RAF came to take it all away (good bloke, RAF bomb jockey called Trevor Alford who I knew well....). He gave me a long length of belt. 4 ball, one tracer, one AP and 1 incendary. I fired some off at Moody Down range but while it all(?) went bang, it was pretty poor. The trace wouldn't light but the incendary certainly fizzed when it hit a falling plate