6.5 Grendal vs 6ARC Brass

[corpsman8483]

Not sure what you're asking, but I used some 6.5 Grendel brass that I resized to 6 ARC and had a little problem getting the shoulder just right in order to chamber in my rifle. I have since gotten a bag of starline 6 ARC Brass and it's much better than resized 6.5 Grendel.
Over my Garmin Chromograph, the resized Grendel brass really messes up my SD readings.