Bowfish, font overlook H4350 or 4831. I was using RL22 and I got decent groups sub 1/2 moa but I felt the rifle could do better. I bought a few lbs of H4350 I went to work again. RL22 gave me velocities right around 2850 from a 22.5 inch barrel at 60 degrees and on average just over .5moa. When i switched to the h4350 my groups tightened up into the .3s and .4s with ease. The velocity was right with tge RL22, I was expecting to see a drop of about 50fps. I have not had a chance to shoot the H4350 at dostance yet, its been too fteakong cold or windy. My best measured group over 100 yards came in at 1.495 for fivr shots at 360 yards with the RL-22. I forgot to mention I am shooting 190 CCs...