Variable probably matter and in every case some perhaps more than others. Every load or recipe is it's own animal I'd wager.
Personally I think all of it gets overblown once a load that performs is found to work. The big enchilada is really being practical and skilled at field positional shooting. I've prac5iced this year and can get acceptable results to 400yd distance but farther I'm only capable off my pack, in the prone, or rested on something then it's easy peasy.
Thank the good Lord I'm blessed in my location to be able to practice in canyons and steep high angle field positions and practicing even a little has vastly made the biggest difference.
