I do not have my data in front of me, but I too have had OK luck with tightgroup for this combination.
I say OK, as the pressure is fine ( I prefer HS-6 for much above 900 fps), but never could get stunning accuracy. From my research it appears it could be an issue with my FA's slower twist. Could also be related to the bullets being a little too hard (Cast Performance and Laser Cast) for this lower pressure, but I was seeing poor accuracy, and not leading. And 360's were much worse, tending to point to insufficient stabilization. Mech is not reporting this, so it could be that Unique might be better than TG?
Not sure what make of gun you are using, but just in case it is a FA. And Hornady 250's were superb accuracy with TG and the reduced pressure.
Craig
Last edited by Bearbait in NM; 02/11/2016 6:41 PM.