I run the Cci 250 primers in mine and consistently have loads that I test hit 6fps extreme spread. What ive found is the guns sweet spot is a round running between 3140 and 3160fps for the most part. Sure I had a slower accuracy node around 3005fps but why not use what's available. The others that fall outside of that range caused the groups to open up a little more and the ES went to 20 or above over a 10 shot group. H100v gets me to 3150fps with no problems and has shown better initial results than all the fine tuning with h4350 did. I'm sold on the 2 dollar cheaper per pound and actually in stock powder
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