This thread aint too long in the tooth to dredge back up...
The rifle I mentioned above has chosen H4350 with the 160 NPT's. Just a hair over 2,600 fps was the sweet spot, & I'll not quibble over any extra fps: the 160 NP should be well within its performance envelope from 0 to 300 yds @ that velocity. Now... if I ever have to shoot in meters, then I might be at a disadvantage...
FWIW, H4831SC gave more than acceptable results. However, it wanted 4+ grains more powder to approach the speeds of H4350, and the groups weren't as tight.
I'll be interested in how things turn out for the OP.
FC
