I have not had very good experiences with N560. It seems to give weird, unexplainable pressure spikes. For example- was testing a single shot Sako with a "middle of the road" load of N560 and 300 gr MK. Basically a zeroing and barrel break in load. Shot 5, everything fine. Next one I had to beat the bolt open. Next 3 fine. Next had to beat again. Then 6 fine then beat two open.
Had this same scenario happen several different times with different Lapuas and 300 WSM
I use Retumbo, 94 gr over a 300gr MK. Rel 22 or 25 is also given me good results over 250 or 300gr MK.