I've recentally tried IMR4007ssc and really like it a lot. Groups are running well under an inch in both my Rem 700's in .243. Bullets i'm using are between 65 and 70 grains, Berger, Speer, Nosler and a couple of custom benchrest bullets. I think the powders you've listed might be a little on the fast side. 4007ssc is closer to WW760 and H414. You might try a slower burning powder if you have some.