I don't think its either of the rounds you mentioned. I first learned of this round on Bullberry's website. They chamber barrels for the 17 Honeybee, as well as the 17 Hornet and the 17 bee. Over the last few days I haven't been able to find anything on the net, aside from a few other threads focused on wildcat cartridges. On the thread a few people mentioned the 17 and the 22 Honeybee. I posted a question, but no reply.