Satterlee 10 Round Load Development

[centerfire]

I'm with Klem. I tried to love the 10 shot ladder but found it is only useful for finding maximum pressure. The "Satterlee" method caused me to work backwards down from my starting point because none of the velocity nodes were where I thought they should be. I eventually took five ten shot ladders, shot the first one and recorded my assumptions/estimations based on Scott Satterlee's explanation of how he does it. I then shot the remaining four 10 shot ladders and calculated each five shot group's ES and SD. My estimations were incorrect and the pressure node was not where the first 10 shot ladder suggested. You're already working with insignificant samples (as pointed out), the 10 shot ladder reduces them to single data points which is kind of ridiculous when you think about it.

I'm naturally disorganized so to improve my own records I shoot all load development on a white poster board target with each group on the same horizontal plane. No mixing or matching groups, loads, cartridges. I then log the load development in the rifle's log book and write the results on the target. Eventually I discard the targets.