I just loaded up some Barnes TSX 150s with LeverEvolution powder. Just over 2400 FPS! Max load is 28.5 grains. I got well under inch groups at 25.5 grains so the workup stopped right there. I wouldn't be afraid to go 200 with that combination. I think maxed out if the accuracy held up decently at all it would still run out of speed around 250 though. 30-30 bullets don't tend to have impressive BCs.