I'd be thinking RL33 and 175 Hornady ELD-X, 180 ELD-M, 180 Scenar. Might as well use those cubic inches of case space:) The Scenar is well proven on elk, bears and deer for us. The 180 ELD is getting some rides this year.
Vihtavuori n-570 is a coarse stick powder that just about won't run thru a powder measure. I remove the drop tube, throw a charge in a powder scale pan, weight each load.
But, in rounds like that it has some great numbers. Check out QL if they have that round in their program. Burn rate close to the old 870 powders, but it's a double based, high energy, dense powder. I wouldn't be surprised if n-570 out performs RL-33.
Powder Valley had it last time I checked.
DF
