+1 too true especially on the firm grasp of fundamentals!Sub 50 grain burn I go up 1/2 to 1 grain unless I'm below start(ie. mil-surp stuff that there is no data for) then I'm rather coarse at 2 grains or so. Bigger stuff, like my 300 rum gets the same treatment, but to scale. I'll work at 1 grain steps close to top, but two or three grain steps IF I KNOW I'm cream-puffing it. An example is the 225 hornady load I developed for my 300 rum a few months back. I started about 15 grains down from where I thought top would be with rl50. Alliant doesn't do data for anything below 50 cal for rl50, so what I was doing was based on similar burn powders. Don't play with mil- surp or powders without data for your round/ limited data until you have a firm grasp on fundamentals( and a good pair of rubber undies).