I finally got to try some of this powder in a .41 mag and .44 mag over the weekend. Since the burning rate is listed as between AA #9 and 2400 I started with the AA #9 starting loads.
The powder is a fairly bulky flake powder but seemed to run though my powder measure O.K. AA #9 starting loads were almost a casefull and I didn't want to start with compressed loads not knowing anything about the characteristics.
The powder seemed to do fine in each gun. The loads weren't dirty like Herco for example and seemed to be consistant and accurate. I didn't chrongraph the loads but judging from the recoil I wouls say they were moderate or hotterr compared to full magnum loads.
Unless the chronograph shows something odd or the powder gets erratic with heavier loads I'm guite happy with it. It should fill a good nich for medium range loads and may work for heavier ones also.