Tried 3 different pellet designs...all JSB. The redesigned clearly shot the most accurate. The same weight Diabolo not good. The 33 grain as bad as the Diabolo. The redesigned at 50 yds, all shots touched each other and you could cover the group with a 50 cent piece. Only shot about four magazines through it so am learning but that's the first exposure and what I experienced. I wouldn't even consider any JSB pellet other than the Redesigned.