Yeah, I've done a little of that. In my CZ the 20-grain V-Max gets about 2100 fps, the velocity of the standard 17-grain .17 M2 load, with 7.0 grains of Accurate 5744, with very good accuracy. I haven't tried it, but 8.5 grains should get around 2550, the velocity of the standard 17-grain HMR load.
