N565 is my go-to powder in the 7SS with heavier bullets (175 and up). You can get a little more velocity with RL26 but the accuracy and SDs just weren't there for me......Pretty good comparator here...the make up of N560 has a bit more nitro in it by design than H1000, so in theory velocities should increase. I bought 16 lbs of the 565 to try after my H1000 runs out in my 6.5 GAP 4S