I am getting ready to load a lot of rounds to go to a competition. It is the first time I have load for myself and not bought factory rounds to go. I have what I think a solid load with 42.2 of xbr 8208 win cases and win primers. I bought a magnetospeed to see what they were running at. Most 10 round strings I stay between 2643 and 2602. But the I get some 10 round strings that get 2643 and 2-3 that are 2593. Should I worry? My sd is normally staying around 10-13. I had one ten round string the sd was 4. I am loading for my .308 22" factory barreled AW. Any help is appreciated. I can post more solid numbers if that helps? I have 5 strings of 10 rounds.