I just tried the American pioneer Powder for the first time today. I was shooting my new Encore 209x50 using 100 grains of APP -ffg, 295 & 245 grain powerbelts with a Winchester 209 primer. The gun was boresighted when I bought it, but this was the first time I've shot it. I started with the 245 PB's at 50 yards and my 1st 3 shots were within 1 inch, with cleaning after each shot. I then switched to 295 grain PB's with the same results. I had 2 different groups of 3 shots with all 3 shots touching. Next I tried 100 yards and got the same accuracy, however I was 3 inches low. I tried 120 grains of powder but it didn't make any difference other than me getting whacked on the bridge of my nose. Finally I decided to sight in 1.5 inches high at 50 yards which puts my 1.5 inches low at 100 yards. This stuff was a breeze to clean, much better accuracy than I expected.
Scott