I have run 3 powders. 63.3 grains of h4831sc runs around 2900 fps. retumbo and h1000 will run that node too.What is your load for the 180? I was using 65.9 grains of reloder 26 with the before mentioned specs on the 168 grain. I was close, but I didn't find magic yet. but that Brux barrel really liked Reloader 26 and burger bullets.
retumbo was the only one in my gun that will run the 3000ish node without pressure
using 210 primers