read up on OCW. Just seems to be a variation on the ladder method but instead of loading for the single best group you load for the charge that will give you a bit of leeway in case your charge is off a couple of grains, or have a temperature fluctuation or will shoot in almost any rifle. In other words, the most forgiving charge. Not sure how relevant it would be for someone who is as anal as I am about their reloads.I did load up some 140's with some IMR 3150 using his method. Still leaning towards shooting them at 200 vs 100 though.