In my Hart barreled Sako Vixen 20 grains of IMR 4198 gives me around 3,200 fps with a 50 grain bullet. With RL-7 it takes 20.5 grains, same speed, and 21.0 grains gives me 3,300 fps.
I also like VV-130 in the 222. AA2200 is a good choice, and has a burn rate very close to H322, another long-time accuracy favorite in the Triple Deuce. RL-7 and AA2200 are ball powders and easier to measure than the extruded powders in case you're loading lots of ammo.
