delcyros
Tech Sergeant
All of the British 6 inch shell(according to Jane's) weighed the same. The ME would not vary with HC or AP as long as the projectile weight was the same.
Janes here is almost correct. Comparing the actual datas (for this question it has to be Campbells Naval weapons of ww2) shows only slight differences in weight for UK 6"ers:
6"/50QF MK V (1955):
APC: 129.75lbs
HE: 132 lbs
British 6"/50 (15.2 cm) QF Mark N5
6"/50 BL MK XXIII:
Common: 112lbs
HE: 112 lbs
British 6"/50 (15.2 cm) BL Mark XXIII
6"/50 BL MK XXII:
common: 100lbs
common (from 1942 onwards): 112 lbs
British 6"/50 (15.2 cm) BL Mark XXII
It seems that ww2 era 6" ammo was serialized at around 112 lbs.