So I went out and did the Berger seating length test. With a completely stripped and clean barrel. Fired 4 foulers then started with .010 Jam. It was the best group these 140 RDFs have fired yet. 1.35 inches. All testing was done at 300 meters. The groups were all 5 shots. Then I did the jump groups...complete and udder garbage. .040, .080 and .120 were all equally bad at around 4 inches. Just to make sure this wasn't a fluke I went home and loaded 5 more at .010 Jam and 5 at .020 jam. The .020 was terrible and the .010 was around 3 inches. I don't know if it's because my barrel got dirty and needed to be scrubbed( after 30 rds???) Or because I got tired but I couldn't duplicate that initial 1.3 inch group. I will check velocities tomorrow at the range. Maybe I need to load the first 15 shots at .010 jump and the rest at .005 to compensate for fouling lol. I don't know.