Jerrys, I just started working on these loads, so I can't jump to conlusions, but I suspect that uniformity in everything is a lot more critical in these, than with larger calibers. I tested loads with Red Dot, Bullseye, and Unique. Red Dot gave me the most uniform velocities, with Unique gave me the most uniform group. The powder charges are so tiny that even a minor variation is a significant percentage. Overall seating depth was measured on each, and compliant with load data, but bullet is barely in the case. What I also believe might be a factor is that I did not sort cases, and they are mixed, nor did I measure or trim them. Everything to do with these is such a high percentage of total. Not like a 9mm, where .1 or .2 grains of powder is insignificant or a case a tiny bit longer affects seating tension. Now that I know what it is capable of, my next batch of testing with be done with surgical precision.