I have settled on 12 strands of TS-1+ with 6 strands of B50 in each loop. D97, 9 strands with 6 strands of B50 in each loop. At first there is some stretch but after that it done. I choose these strings over all others tested because they made our/my bows Quiet. I found no Great speed gains, my groups got a little tighter at 20 yards. Just as we ALL have tried different bows, arrows, broadheads, strings, and so on to find the right fit. This is what I and others have found that works for us. My mind is alway open to learn from others, somethings work, others don't.