When you guys adjust your COL do you drop your powder charge and work back up? I am playing with a developed load adjusting the overall length to see if I can get a better group. I will be shooting 3 shot groups with the adjustments of -.02, -.01, +.01, and +.02. The load that I shoot is a pretty heavy load. Is the adjustment going to be that great of a change in pressure? I am working with 200gr Barnes LRX in 300 WM with Reloader 25.