I took my 7mm STW out today to get ready for my deer season and I have some strange chronograph results. In 9 shots my velocity ranged from 3137fps to 3292fps. . The load is 78gr of RL-22 and a nolser 160gr accubond with fed 215M primers I don't understand how I am getting this large of a spread. Also I am loading 20 thou. off the lands. I full length resize and weigh all my loads on an RCBS digital scale. I also use a flash hole uniformer. Are these normal spreads or is something going on hear I'm not catching?