I read with interest Matthew Cameron’s article on safe loads. Consulting current load data sources is always a good idea and lets us spot any that are out of line. Recently I have been working up some loads for my 6.5x55. This cartridge must be the poster-child for variable load data and the more you look the more confused you become.
A different approach is needed. Several articles by John Barsness on pressure and load development were published in Handloader Magazine over the last decade or so. These boil down to two basic principles: