This is a tool cartridge that consists of a standard .38-caliber, green, “Fortiflex” case, brass primer holder with D C .38 headstamp, and nickel primer. Inside is a tool projectile, or “stud,” that I have not been able to identify and would appreciate any help you might give in identifying exactly what it is. The stud is 22.7mm/0.894" long and the back part has a diameter of 9.5mm/0.374" with a W “headstamp.” It is made of zinc-chromate-plated steel. The red plastic covering of its pointed tip has expanded petals to act, I assume, as a bore rider to keep the stud straight in the bore of whatever device fires it and maybe lubricate it as it hits whatever it’s being driven into. A Fortiflex gas check is loaded between the propellant and the stud. The cartridge cannot be fired in a Dardick pistol with a standard .38 caliber barrel; its diameter is too large, and in fact two of my specimens have already cracked open because of the oversize stud being forced inside the .38 case.
It’s a mystery. Please help me solve it. Thanks.