I'm aware of the usual method to find the sweat spot for bullet seating depth . Starting groups of 6 @ .10 off the land on up to .50. the .90 and so on. Suppose I'm using my favorite load. One is 180 AB with 75.5 of RL22 and I find the sweat spot maybe i't's .55. Question is, if I want to do some more load development with this 180 AB and a different powder would my sweat spot possibly change or can I rely on that measurement for all load development.