I've been using 777 (loose) for a few years now. I get 1,725 ft/sec when using a 100gr equivelent charge and a 300gr XTP sabot bullet in a Knight MK85. Velocity doesn't vary more than 25 ft/sec in either direction. I still find 777 to be dirty and was looking for a better alternative.
I bought a can of American Pioneer pellets. The stuff looks like broken off pieces on concrete and apparently has plenty of air space around the pellets when loaded. I fired 7 rounds without swabbing between shots and got velocities between 1,250 ft/sec & 1,700 ft/sec!
Accuracy was poor with the 270gr Platinum Powerbelts that I was using at the time.
Anyone else have an experience like this with AP?