Purchased a .45 Knight Disc Elite from the ModernMuzzleloader.com classifieds in October 2009. Still testing but it looks promising so far. Able to get an additional 300 fps with a 200gr .40 SST/Shockwave and still getting MOA. Really only means the drop is 7" instead of 9" between 100 and 200 with the .50 so not a huge gain. Need to do more testing but I'm dialed in we enough for this season.