For those not in the know.. evidently AA 2700, is the same powder as H 414 and W 760... just passing that along...
You're correct re: current H414/WW760 is the same powder at this time. 760 didn't change...H414 did.
I have recent production/packaged Accurate 2700 and Winchester 760 here (8 lb. jugs). They are different enough that when testing identical loads of each in either my 243W or 25-06 resulted in significantly different 'on-target' accuracy and chronograph numbers in both cases. And while there can be some lot to lot differences in all powders, the difference in these is well out of what you would expect from different powder lots. To back this up, a good pal that uses 2700 in his 220 Swift Ackley Improved did the same A-B-A testing against 760 with the same results. Borescoping with his Hawkeye borescope confirmed that the 2700 (current production) left markedly less hard carbon buildup in the throat than the 760 (also current production).
From two well tuned-up powder measures, current 2700 and two earlier 2700 versions I have on hand (incl. the original Accurate Arms version), there's less than a .1 gr. variance in weight when thrown by volume.
While I'm certainly not "...in the know", all I know is what I'm seeing at this point. Maybe someone like MD with a better grasp of the industry could add some better info.
Will 2700 become 414/760 at some point? Who knows?
If so, maybe they'll eliminate the confusion and call the new powder '1291'.
Good shootin' -Al