Just noticed that Nosler added data for Ramshot LRT (Long Range Tactical) for the .264 Win Mag / 140-142 bullets combo and Western Powder has some data:

http://blog.westernpowders.com/2018/03/ramshot-lrt-data/

It appears to be somewhere in the vicinity of US 869 or the old Win 870.

Anyone tried it or seen it on a burn rate chart?