I have been using it since October, in a Mod. 70, .270 win. with 130 gr. and 150 gr. bullets but I haven't had much of a chance to shoot since I started trying it. It seems to burn clean and also seems to be as accurate as any powder that I have fired in that rifle. It may even have a little edge on accuracy. So far, I have only fired about 40 rounds of 130 gr. and 20 rounds of 150 gr., none on a calm day. With 53 gr. of H100v, Fed. match primers, Winchester and necked down Lapua 30-06 brass; 130 gr. Bergers, tipped triple shocks and Nosler solid base bullets have been chronographing from just over 3000 to about 3100 fps., with no excessive pressure signs.
I don't know if this info is of any value in regard to benchrest calibers or rifles but I too would like to know of anyone's experiences with this powder. I plan to do some more testing with it, hopefully in the near future, I was impressed enough with it to buy and 8 #er. Although part of my reason for buying it was the Obama factor.