"Anybody weight sorting? Have you seen any improvement in group size or a reduction in ES? "
About three years ago, I weight sorted an entire brick of SK Std + ammo. It was available for about half the price as Lapua CX and shot almost as well. I was hoping to obtain a big improvement and I did see some gains. However, what I ended up with was about four full boxes of ammo which all was of equal weight to the tenth of a grain. Two boxes were the same weight and one each was heavier or lighter by 1/10th grain. Then there were several partial boxes of each additional weight. The spread from light to heavy was about 5 or 6 tenths. Each sorted box performed well and I recorded some amazing groups. However, I found it near impossible to record several good groups in a row as we would do in the 6x5 challenge. There would always be one or two groups which were drastically worse than the others with one shot going way high or way low compared to all the others. As best I can tell, the causes for the rounds weight variance is not all from powder & primer charge variance. Apparently, the occasional brass cartridge or bullet weight would be off a few tenths. Thus despite being the exact same weight as all the others, the shot would be either hot or slower than the others forcing a flyer. I never was able to shoot 30 shots without experiencing at least one of these bad shots. It was frustrating. Plus, every time I swapped boxes for a different weight the POI would change slightly. This made shooting the sorted ammo in matches tough if I needed more than two boxes. It was time consuming and tedious and in the end, I concluded that it was more efficient to pay Eley or Lapua for their better grades of ammo and be done with it. I never tried sorting 10x or Midas+, but I would expect similar results with only less total variance. I see no repeatable method to sort by weight and know why a round's weight varies. So, the risk of an extreme flyer is going to still be there. They say sorting by head spacing also. can make a difference but I never got around to trying it. Maybe when I retire??
Irish