I have two French .30 Carbine Steel cases in my own colletion.
NPE case: 4 VE 49 C Berdan primer - a look inside the case shows heavy rusting at the flash holes, and the primer was never even fired.
Ball round: 2 VE 52 F (Dark gray FMJ RN bullet with the look of German Sintered-iron bullets, although the finish of the jacket is not grainy in appearance like the German ammo, and may not be Sintered Iron at all. The bullet is heavily magnetic.
There may be others, of course.
I have never heard of any French non-corrosive .30 Carbine, or any that was Boxer primer. What is the headstamp, and the other specs on those rounds if, in truth, they exist at all?
I, personally, would not pull the trigger on any French .30M1 carbine round loaded in an M1 carbine. Damages caused to carbines fired with this stuff have been covered before on the
Forum. The only worse carbine ammo ever made, I think, was the junk made in the Dominican