I have used it for a couple of years now, and came across it in my pursuit of trying to reduce the number of different components on hand. I use only Remington hulls but there are loads for AA hulls on the Alliant site and I believe they are in the Alliant book as well. I use 20/28 almost exclusively because it is fairly versatile and gives me a singles load and caps load with the same components. There are no published loads for anything less than 1200fps to my knowledge. For a handicap load, I use 23grs in a Remington hull (GC,GL,STS,N27 etc) with a Win 209, and a figure 8 wad which is published to produce 1250fps. They chrono 1260fps on average with avg deviation of 12-15fps. I mainly load 22grs with the same components for a published 1200fps. They chrono on avg. 1230 with a similar deviation. These muzzle velocities are from a 34 inch barrel. A 30 inch barrel will chrono very close to the published velocity. I shoot them in temps from mid 90's down to mid 20's with no noticeable problems.