here is a link to the most detailed discussion of the ladder/audette method of load development. the article is very long with pictures etc but well worth copying to word file and saving. Got more details than I knew. For example they discuss shooting a ladder (20 rds) to find seating optimum seating depth. Never thought of that.
http://home.snafu.de/l.moeller/Laddertest.htm#Laddertest
BH
http://home.snafu.de/l.moeller/Laddertest.htm#Laddertest
BH