I have used either 2219 or 2206H as per ADI loading data but have settled on 2206H:
http://www.adiworldclass.com.au/data-ri ... -56-x-45mmNoting I mostly only target shoot these days.
What I found was the ADI load was very conservative, so further load testing was necessary to get closer to the ADI stated velocities. 2219, 55gn Hornady VMax gave an average of only 2926fps at 22.4gn (measured with LabRadar).
However even the 2206H was a bit slow at the ADI listed load weight. I went as high as 26gn which gave 3298fps, but was a little stiff opening the bolt and I dropped down to 25gn which seemed good and shot accurately. (Tikka T3 Super Varmint).
Hope this is of some help.