I normally start at 100 yrds, with about 6 loads from start to max in .5 differences.
Then when I find a couple that seem best, I then do at least 6 loads with .2 difference.
Then when I have at least two that are best, I try some with .1 difference and also might tweek the bullet depth and distance from lands. When I finally have a load that is working best, then I give them a go at other distance and see if they are holding true. Just my way. Bill K
I came back for one added comment. Lead Sled ? I know they help tame recoil and all, but a person should really learn to shoot over and on items he/she will use in the real shooting situations. Just my thought, never wanted a lead sled.