6mm Tom Turkey, anybody heard of it?

Good afternoon everyone, Got a good one here.
I was buying a few used die sets from a guy on another forum, and instead of the 6x223 dies I purchased, we had a mixup and I got a custom rcbs set in 6mm Tom Turkey. couldn't find any info online, and the guy I got them from had no idea as the dies were his deceased uncle's. So I went out to the reloading room, mounted up the sizing die, and ran a well lubed 223 case in the die. What came out looked like a brass chimney pipe with dimples all over, so next I tried a 300 blk case. what I got this time appears to be a 6mm version of a 221 fireball, with a slightly shorter to shoulder length.

So, anyone hear of this wildcat before? or is this someone's pet turkey slayer? might be fun to use for plinking cast bullets in a single shot.

i think it may be unique, maybe a 6x45 reamer run in short. I may try to build something to shoot them...

Here is a pic of the case next to a 221 fireball dummy I threw together. the fireball is the one with the bullet, and yes, I did collapse the shoulder a bit forming the case, but this was just scrap 300 blk cases from the brass bucket. It is an interesting one...