I haven't tried N568, yet, but I did pressure test N565, RL26, and H1000, yesterday.
Did not find max pressure for N565 at 79.50 gn and 3229 fps.
H1000 pressured out at 87.50 gn, 92% fill, and 3489 fps.
RL26 pressured out at 84.50 gn, 90% fill, and 3465 fps.
Although I was hoping for more...