They use pretty old ammo, from what I can read on that ammocan; FN 63?! Thats 43 year old stuff... Not that there is something wrong with that ammo (I shot 70 year old ammo without a promblem one time), but it's strainge that we don't have some more recent stuff around.
BTW, nice mix of cartridges: one tracer, two AP and two ball.
2 Ball, 2 Ap and 1 tracer is standard in non-peacetime operations, whereas 4 ball and 1 tracer is standard during normal gunnery. (1 set of 230 tracers does look very neat during nightfire, to be honest.)
I think this last episode of windmill was quite allright, ofcourse the time is too short to explain certain things more specific, but the general picture was allright.