I started working on the same idea, but it got moved to the back burner. I got 2457 fps out of a 24" contender carbine with 32 grains of IMR 3031. Accuracy was okay. I didn't do much more than work up to that load and chronograph ten rounds to see what kind of speed I was getting.
Really flat shooting compared to the 180 gr ballistic tips I usually shoot. I had to come down about a foot.
