Most manuals give several powder charges for a particular bullet weight so it is pretty well covered. Maybe ?? They don't give data for a 20 ",22" 24" & 26" barrels in the same caliber & same bullet. This is where increasing or slowing the burn rate can correct things like barrel jump, secondary pressures, etc. while getting the maximum velocity and energy from your reloads.
the reason i was wanting a born rate table was for a few reasons, the slower burning powders in some cases need a mag primer, and alot of the time you will hear of a good load for a caliber you try it and it dosent work. The manuals only have so many powders, so I can cross them ont the chart and see what else might be close to that.
As I sit and glass, which is common for hunters out west, I have sort of quickly discovered something I never learned when I was younger.
In my youth I had enthusiasm and spirit. In my middle to advancing years I have creaky knees, arthritis, and I tire more easily than I used to. Where I used to sit on the cold hard ground I now look for that soft spot to sooth my tired muscles. That leads me to my tip.
Carry your soft spot with you!
In my pack I carry an air filled, ultralight, camping pad....