I have read that a good powder choice for handloads to be used in a A Semi Auto rifle is a medium burn rate powder, to keep jams to a minimum. I also understand that loads should not be either slow, or very fast, but somewhat in the middle of the velocity table. Is there an IMR Powder that you find that works well in these rifles? 4350, and 4831, are too slow? maybe 4064, or another? I will be loading 165, and 180 grain Hornady BTSP.