Another Pick-up from SLICS
Headstamped FA 43 is this cartridge with white tip.
First I thought this would be an early M2 Tracer but the jacket is GM and not GMCS
Also this cartridge has a very faint smooth cannelure instead of a knurled one.
Could it be a T13 delay Tracer cartridge (ivory tip). However I am not sure if this one should have a cannelure or not.