He said he had heard about it from a custom gunsmith, a "Dave", who built tactical rifles. I haven't seen him since then but said it was either a 7mm or a .270 cal. The only "Dave" I know in custom business in Dave Tooley and I know him personally and he is mostly in benchrest rifles.
Thanks for the reply. It has me buffaloed. It could be that "Dave" is trying to boost a wildcat which he has come up with.
I don't believe there has been much revolutionary in benchrest 1000 yards shooting, cartridge-wise, but thought maybe the tactical boys had come up with something new.