I have a .90 Cal T4 that I would like some more info on. When were these in use? The headstamp is “CAL 90 T4 (quartermaster symbol)) 4430 - F A 1 W R”. What does the 4430-F A 1 W R mean? In ink on the head is “AMM LOT 130–8P-A” with a black band across the niddle od the head. What does the black band mean? On the side of the case in black ink is “HERC.NH.M2 HERC.LOT 4148-1939 CAL. .90 G T4 MV2700”
The projectile has an aliminium flat nose fuze cap. The body is black (appears to have been painted over a bright yellow) with “INERT” in white letters. Below this is a 23mm wide coppor driving band. Does the “INERT” mean just the projectile or the entire round. There is no other sign of the round being inert. It sounds like it is filled with a coarse granualar powder and the copper primer is not struck. The whole round is packed in a heavy cardboard tube.
Any information about this round or the entire series of .90 Cal. T4 ammunition would be appreciated.