Well thought I'd post this to all of you seasoned reloaders. I've been successfully reloading for years and just started building some new loads for my 9.3x62. I settled on Graf brass ( only thing available at the time) and Speer 270 Hot Cor. I loaded at minimum load data per Speer manual and had some interesting things occur at the range this morning.
Out of 30 rounds, I had 5 fail to fire on first try - they did fire second time but they were fliers from the rest of the group. On some that did fire first time, I had primers backing out a bit. I even had two primed cases that after seating the primer looked to deep so I only fired those without a charge and those backed out as well. I know this brass is not consistent in terms of uniformity (some fit loose in shell holder, some tight, some not at all) so I sorted and only used those that fit without force in the shell holder.
Anyway, my question is - it the variances in the brass that is causing this or something else? I do have to say also that I normally use a Lee hand priming tool with great success, but unfortunately none of my brass would fit in the shell holder without much force. I therefore, bought an RCBS hand priming tool and used that to seat the primers. I can tell you I don't think I seated primers as well as in the Lee.
Also, I'm pretty sure it's not the primers - I've used same primers in other loads lately with 0 problems.
Thanks for your thoughts.