I don't think VV makes a bad powder. I have heard 160 and 560 were some of the best in a 280. I use a bunch of 570 in my Mashburn. Works like a champ and is very reliable, no matter the temps.
Vv-570 is the velocity champ on my 26 Nos. It’s a coarse stick, won’t flow thru my Uniflow, it stacks. I remove the drop tube, drop a near full charge in a scale pan, tweak to the right weight. It reportedly burns pretty hot, is high energy and probably not very barrel friendly. But, I don’t shoot the 26 that much, it’s a hunting rifle, not a target gun.
DF