I've found H110 to be very accurate in my 44. I like 1680 too, it is accurate as well, but does not make the velocity H110 does. I suspect Blue Dot, 4227, and 2400 will do best with the 200 grainer for full velocity. I have always liked Unique, but in the 44 it will reach max pressure before it reaches max velocity, but it does shoot accurately.