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.
When it comes to scent, there are basically two types; those that attract and those that mask. I've tried both on many occasions. There are lots and lots of "doe in heat" scents, designed to attract a big buck into range. I've also used a "cow in heat" scent while elk hunting.
Another scent would almost be better named as a "coverup smell". The main goal is to cover up human odor or mask it. Though I don't believe you can ever totally eliminate all human...