In testing the new Alliant 300MP I started low and worked my up to the velocity my bullet has liked over the years and verified the accuracy on a sighter target. I then shot three ten shot groups at 200yds. Target 1 group size .811, Target 2 group size 1.186 and Target 3 group size 1.921. Target 1 Hi 1477.1, Lo 1466.0, SD 3.7, CV .25%, MAD 2.8, CV .19%, ES 11.1 Average Velocity 1472.2. I did not experience any unexplained shots which has been typical with other powders. The mirage was picking up as I moved through each 10 shot target. The vertical remained the same for all three targets but the horizontal grew due to my inability at times to correctly read the mirage. I was shooting with a couple of friends one of which shoots a 32 based on the 32-20 case via Paul Shuttleworth and this powder did not work for him. In my search for a new powder I also had on hand some newly purchased AA4100 to try. This powder did not work for me as I could not get a handle on controlling the vertical which was extreme. My shooting buddy gave it a run for the money in his 32-20 and it performed extremely well shooting back to back 10 shot groups with very minimal vertical and outstanding accuracy as well as group size. The AA4100 out performed his AA-9 by quite a margin. I shoot a CPA Traditional Model 52 in 32-40, Dell 59C, Rem 91/2 Primers, Bullet Breach 10 thous. beyond the start of the lands, 1/16 cork wad inserted into the breach seater and seated behind the base of the bullet. Due to the increased air space created by my increased seating depth my powder charges are usually higher than what is typical. The above chronograph data and the load I have settled on for future testing is 14.4 grains of 300MP. The bullet used was the Hoch 322-200 tapered cast 1-25 and weighs 207.9 cast at 800 degrees. Barrel is a 28 inch half octagon Douglas premium with a 1-15 twist.