I took 5 each loaded with 46,46.5,47,47.5,48 grains of IMR 4064 under a 168 amax. I got the best group about 3-4 inches at 100 yards with 47.5. Although it seems 46 seemed to work decent too. I hade a lapse in attention span today and grabbed a mixed bag for my first clip and screwed up the order but it seems that the 46 shot well. I know it seemed to eject with much more vigor than usual with 150 grain surplus.