While those numbers can be a blessing, they also can be a curse. Don't get too hung up on them. You will drive yourself crazy chasing down the perfect numbers.
What I found works best is use them as a baseline for each individual machine.
For example, my micky sharpz tdial runs at 37% and it puts ink in the way I like it. Whenever I tune any tdial I own, it is set up near the 37 to 40 range. However I would never tune my next generation to that. More like 45 to 50%. And each machine design seems to have sweet spots. When you have a machine working great, just write down the numbers, then in the future tune to those .
If your pulse was working well at the range you mentioned why change? Its been a while since I've used my solution , but if memory serves me correct the numbers you mentioned seem close to what I ran. Also a long stroke machine will produce a lower % than mid or short stroke machines.