I plan on giving it a shot myself. So far RL16 has been excellent in the 270 Win with 130's and the 30-06 with 180 Accubonds.
Seems really darned close to H4350 in my book.
More info please.
Check out the data on Alliant's page for RL16, I am running their loads so far and I am not lagging behind their speeds by very much in my rifle. I will get some better numbers for you once I get it back out and shoot it some more, but I am pretty impressed with the stuff so far. I couldn't get H4350 so I decided to give 16 a try and have no regrets so far.
http://www.alliantpowder.com/downloads/RL16_Initial_Loads.pdf
