My 308 brass is once fired. I will resize cases in a 308 Win die and then run the cases into a 7mm-08 Rem resize die. Then I will trim cases. Also, I will remove the expander from each die. Later I will expand in a separate operation. I will trim cases. Zero cast bullits will be loaded--J words only.
My concern is increased neck thickness that would create excessive pressure. I'm seeking advice on the total process and ask for dimension criteria for case necks. Is annealing required?
I realize that I could buy 7mm-08 Rem cases but wish to experiment.