Here is something that has not been discussed. That is liability. Think of it there are rifles out there in 30-06 that may be 100 years old as well as 270s that are 80 years old and 30-30s well over 100 years old. I know the ammo manufacturers take this into account when loading for those really mature calibers. I am just as sure that the reloading companies/powder companies must look at things in this light too.