I picked up some X-treme 220gn plated RNFP's a couple weeks ago and finally got to experiment with them today. I used Accurate Solo 1000 and Accurate #7 powders to get a feel for the difference between a faster and slower powder with these heavy bullets. It was my first time loading with AA#7 so I underestimated what I needed to make major PF, but I did find a really nice soft minor load with it. I tested these at 1.18" out of a Tanfoglio Stock 2 with a 9lb recoil spring. Temp was 81 degrees. These loads cycled well and the sights barely lifted.
Solo 1000, 2.6 grains
Avg power factor 122.4
Low FPS- 513.4
High FPS- 591.5
Avg FPS- 553.2
ES 78.1
SD 22.13
Solo 1000, 2.8 grains
Avg power factor 135.9
Low FPS- 603.6
High FPS- 623.4
Avg FPS- 616.7
ES 14.86
SD 4.58
Solo 1000, 3.8 grains
Avg power factor 166.7
Low FPS- 748.0
High FPS- 763.1
Avg FPS- 757.8
ES 15.14
SD 5.29
Solo 1000, 4.0 grains
Avg power factor 169.9
Low FPS- 758.5
High FPS- 783.7
Avg FPS- 772.1
ES 25.2
SD 8.30
Accurate #7, 5.3 grains
Avg power factor 125.8
Low FPS- 551.6
High FPS- 603.6
Avg FPS- 571.9
ES 52.0
SD 14.71
Accurate #7, 5.6 grains
Avg power factor 134.3
Low FPS- 590.1
High FPS- 635.2
Avg FPS- 610.4
ES 45.1
SD 17.1