I have found that 99% of the rifles I owned of loaded for shoot best when you have them loaded to the base of the neck than being said.
Never go below min loads listed and never excede max loads listed. If you do that I normally run .2 incraments but .3 will work as well.
Many times I will load 20 starting in the middle and working up my 1 grain at a time. Once I find the best shooter I start there and and load -.2, -.4, -.6, -.8 then .2, .4, .6, .8 if I can go that far and stay in the safety zone. I load 5 with each load and see who shoots the best. After that I may play with seating depth a little to see if that helps.