Can someone tell me why when two different powders are right next to each other on the burn rate chart, that one will be recommended for a certain cartridge & the other not. In theses times with powder impossible to get I am looking for substitutes. I realize that pressure to weight ratio will be different but by taking other cartridges that show use of both powders & figuring the % difference & applying this couldn’t I come up with a reasonable starting load. Right now I am looking at 38/55 loads, H110 & 5744 are right next to each other on the chart. Accurate #9 is also right there also. I can’t find either of these listed for 38/55.