Yes, I have, might try some next summer when I resume testing again, but they are mighty pricey, so far, the best results have been from Lehigh's 110g Controlled Chaos, but I don't know how fast they are going because my Lab Radar chrono stops at 3900 fps and these are going closer to 4000. Last summer I took a shot at a chuck that ranged out at 1122 yards and just missed him by a couple inches, the gun is heavy enough that I can watch where my impacts are, I was using the Lehigh and hold over was amazingly low and trajectory is incredibly flat, this will probably be my "go to" bullet but I have a few more powders to try. I could use solid bronze or copper "match" bullets but they don't expand, the Lehigh's will still explode well beyond 1700 yards out of this gun. I wanted to build an ultra-long-range gun for varmint hunting in the South Hills of Idaho where it's quite common to get shots on chucks and coyotes at these ranges. I normally use my 26 WSSM out to about 600 yards but I think I'll be liking this tool for the ones way out there once I get the best load for it.Have you looked at the Cutting Edge Ballistics Raptor yet?