The JFK murder has certainly been well enough examined BUT here are some facts of interest to ammo collectors;
The FBI contacted Woodin lab within hours of the murder and obtained ammo samples of the same type for testing.
The US made 6.5mm Carcano ammo was fed through an Italian SMI clip.
2a) Oswald did not have a full clip of ammo.
The Italian government would not identify the marking “SMI” on the clip when asked by the US government- reason - state secret ! This is stated in the Warren report !
Mark Furman’s book " A simple case of murder" is all you need to read about the matter.