Well, I decided to try the IMR4895. Loaded some 10% below max with variable seating depths. After sighting in my scope, this was the first little group I shot. 3 shot group, 0.58 MOA at 100 yards. 129gr Hornady Interbonds, 38gr IMR4895, CCI200, PRVI brass, 0.01" off lands, Savage 110 with a 24" Varmint contour Shilen barrel. These were shots 5, 6, and 7 out the barrel.