Like super T, I have generally found that powders a little slower than H4831 and RL-22 often group a little better with bullets in the 140-grain class. My recent notes indicate they include Ramshot Magnum (introduced 22 years ago!) and more recently IMR8133. With either 3200 fps or so generally easily possible with published, pressure-tested loads--and both are far more temperature resistant than RL-22, if that's a factor.
