Yet there are manuals and published "experts" who always say ONLY use brand new brass to work up new loads! Crazy.
bobnob17
The reason many of the old timers recommended the use of new brass was that in order for the cartridge head expansion method of gauging pressure of a load to work it was recommended to use new brass. The assumption was that even once fired brass would alter the characteristics of the brass and give unreliable results.
