Since DocGKR first mentioned this caliber, almost in passing, I've thought it was the most interesting of the intermediate caliber service rifle possibilities.
I was beginning to think it had died and then saw this.
http://www.thefirearmblog.com/blog/2...carbines-pdws/
I still don't understand why a military carbine/caliber solicitation with ammunition standards would place an 18" upper limit on gel penetration.