Re: 30 378 starting load data needed
I would start with 100 gr Retumbo and ladder up in .5 increments with a Fed GM215M primer. Depending on throating of course but I would bet somewhere around 105 is where you will end up.
PS: Do not overlook the 200gr Accubonds. And yes even for paper a long ways away.
Please post your results with the JLK's and Broughton. Is it a 5C?