Well, I got 1lb of 300MP from Midway. And after seeing the hazmat fee, added 5,000 CCI 300 primer to the order to try and make it more worthwhile. I'll be ordering from the store in future. I started with the Montana Bulletworks 310gr WFN-GC bullet, loading 12 rounds of each charge. 20.0, 21.0, and 21.5grs. Then I took them to the range with my Redhawk. As the charge went up the groups got tighter. Back to the house and loaded the last 14 cases with 22.0gr, and back to the range. Another 12 round group was even a little tighter, despite some issues with the gun*. So the groups weren't amazing, but I can tell the potential is there for them to be as accurate as the other load I've worked up with the same bullet. I fired the last two through my SBH, to compare the felt recoil to some other loads. These ones are certainly a notch up from my 2400 load. I'll be experimenting more with this powder, but so far I can't find any negatives to complain about. *Because I knew I was going to be running some stout loads through the Redhawk, and because I wanted a lighter trigger, I switched the grip and the main spring. The main spring is proving to give 100% reliable ignition so far, even DA. But the Pachmayr Presentation grips are big enough that whilst reducing felt recoil very well, they require a slightly different hold on the gun than I've been used to. And that caused some POA/POI variances during testing.