“I am getting a crisp line, about 1/16" above the top of the taper of case after resizing”
It is not that I would take the time to research the procedure but I am forming cases from 8mm Remington Mag, 300 Weatherby and 300 Win Mag cases with three different forming dies, the best dies for forming are the short ones, One step requires the die to be adjusted off the shell holder .340”, If I was really good I still could not make that adjustment with a wild guestimate. Once I get to the point success is greater than the chance of failure I box-up the dies ‘AND MY case LUBE’ then start forming cases to fit the chambers of a group of wild cat rifles.
Some of the cases were formed from 300 H&H cases, then comes annealing. Again, I make annealing tools.