So, a few weeks ago I sat down and did an nice long run of .223. LC brass, 69gr Sierra Match Kings, and 22.6gr of H335 (lee perfect powder measure on my Pro 1000) I got to wondering, and to make sure I was not over charging the loads, I sat down last night with my scale and weighed them all. The lowest total weight was 185.5gr and the highest was 190.5, with most of them being in the 187.3-188gr weight. I know my powder measure is not the most accurate, so I made sure to throw a little low to start with, so I am not worried anymore with over/under charge. My question is: Could the cases be accounting for most of the differences I'm seeing? These were not loaded for super accuracy, it was just a run for learning and to get some rounds put back.