Here's a link to my discussion about what I call the "scatter node", which is why I believe the ladder test so often fails to lead the shooter to the correct conclusions.
http://optimalchargeweight.embarqspa...der/4529811360
The OCW system is about finding a great load in as few shots as possible. With component costs and availability being the issues they are these days, the old "hunt and peck" method of load development is--unless one just gets quite lucky--an expensive way to go.
Dan